A northern perspective on reef aquaristicshttps://riuttareef.com/https://riuttareef.com/en/articles/euphyllia-deep-dive/https://riuttareef.com/en/articles/euphyllia-deep-dive/A comprehensive guide to the biology, care, diseases, and pests of the Euphyllia genus — hammer, frogspawn, and torch corals in detail.Mon, 08 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/sps-deep-dive/https://riuttareef.com/en/articles/sps-deep-dive/A comprehensive guide to SPS coral care — especially Acropora — for the experienced hobbyist: taxonomy, ULNS vs. moderate nutrients, N:P balance, lighting, flow, RTN/STN, pests, acclimation and tank maturity requirements.Mon, 08 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/dosing-methods/https://riuttareef.com/en/articles/dosing-methods/A comprehensive guide to the most widely used reef dosing methods in Europe: one-part, two-part, Balling variants, Triton Core7 Flex, kalkwasser, and calcium reactor — comparison, products, and practical recommendations.Sun, 07 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/coral-color-pigments-deep-dive/https://riuttareef.com/en/articles/coral-color-pigments-deep-dive/Why corals are colourful, how fluorescent proteins and chromoproteins work, how light and nutrients drive colour, and what bleaching reveals about the pigment system.Sat, 06 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/coral-groups-basics/https://riuttareef.com/en/articles/coral-groups-basics/A beginner's guide to the three coral groups — what they are, how they differ, and the order in which to approach them.Sat, 06 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/coral-groups-practice/https://riuttareef.com/en/articles/coral-groups-practice/A practical guide to parameters, placement, allelopathy, feeding, and mixed-reef technique for each coral group.Sat, 06 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/cyanobacteria-practice/https://riuttareef.com/en/articles/cyanobacteria-practice/Identification, cause hierarchy — nutrients, flow, light, DOC — and treatment protocol from chemical to antibiotic.Sat, 06 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/cyanobacteria-research/https://riuttareef.com/en/articles/cyanobacteria-research/Cyanobacterial evolution, nitrogen fixation, endoliths, holobiont role, toxins and allelopathy — the biological reality behind the practice article.Sat, 06 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/fragging-practice/https://riuttareef.com/en/articles/fragging-practice/A practical guide to cutting and propagating corals: the right tools, techniques by coral group, gluing methods, plug selection, and how to manage the recovery period.Sat, 06 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/iodine-bromine-deep-dive/https://riuttareef.com/en/articles/iodine-bromine-deep-dive/Iodine speciation (iodate, iodide, organic), bromine's role in skeletal construction and chromoprotein synthesis, deficiency and overdose symptoms, supplementation, and measurement.Sat, 06 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/lighting-basics/https://riuttareef.com/en/articles/lighting-basics/Why corals need light, what PAR and DLI mean in practice, and how to choose the right lighting level for different coral types.Sat, 06 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/temperature-basics/https://riuttareef.com/en/articles/temperature-basics/Why temperature is one of the most critical reef aquarium parameters, what the target range means in practice, and how temperature fluctuation affects corals.Sat, 06 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/trace-elements-nutrients/https://riuttareef.com/en/articles/trace-elements-nutrients/A comprehensive guide to all ICP-OES element groups — macroelements, dynamic elements and the relevance line explained in practical terms.Sat, 06 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/water-changes-basics/https://riuttareef.com/en/articles/water-changes-basics/What accumulates and depletes in a closed reef system, why regular water changes are the most reliable maintenance tool, and what they cannot replace.Sat, 06 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/water-changes-practice/https://riuttareef.com/en/articles/water-changes-practice/How often and how much to change water, how to prepare replacement saltwater, the mechanics of a water change, automation options, and what water changes cannot do.Sat, 06 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/activated-carbon/https://riuttareef.com/en/articles/activated-carbon/Activated carbon's adsorption principle, quality differences, reactor sizing, replacement intervals and risks — when to use it and when to leave it out.Fri, 05 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/laboratory-tests/https://riuttareef.com/en/articles/laboratory-tests/ICP-MS, SAC254, N-DOC and microbiome DNA sequencing — what a home test cannot reach and when a laboratory is justified.Fri, 05 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/protein-skimmer/https://riuttareef.com/en/articles/protein-skimmer/The physics of foam fractionation, sizing principles, skimmate interpretation, CO₂ scrubber and pH connection, and the most common adjustment mistakes.Fri, 05 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/salinity/https://riuttareef.com/en/articles/salinity/ppt, PSU and density — three units and how they convert, refractometer calibration, the ATC problem and why salinity affects every other measurement.Fri, 05 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/coral-dipping/https://riuttareef.com/en/articles/coral-dipping/Riuttareef's three-dip protocol for maricultured and wild-caught corals — Nyos Coral Dip, Reef Primer and hydrogen peroxide — plus aquacultured coral handling.Thu, 04 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/doc-dissolved-organic-carbon/https://riuttareef.com/en/articles/doc-dissolved-organic-carbon/What DOC is, how SAC254 measures it, why refractory fractions accumulate in closed systems, and how ozonation, activated carbon and skimming affect DOC cycling.Thu, 04 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/lighting-practice/https://riuttareef.com/en/articles/lighting-practice/LED fixture selection, placement, optics, acclimation and photoperiod — the variables that get your PAR value right and keep it there.Thu, 04 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/lighting-research/https://riuttareef.com/en/articles/lighting-research/Cell-level light physiology: zooxanthellae, chlorophyll absorption peaks, the Stokes shift, photoacclimation and photoinhibition.Thu, 04 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/ozonation/https://riuttareef.com/en/articles/ozonation/Ozone chemistry, ORP control, equipment, trace element interactions with iodine and bromine, safety protocol and the connection to DOC dynamics.Thu, 04 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/refugium-practice/https://riuttareef.com/en/articles/refugium-practice/The refugium's four biological functions, macroalgae species comparison, lighting, reverse cycle, trace element compensation, harvest schedule and comparison with Chaeto reactors.Thu, 04 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/refugium-research/https://riuttareef.com/en/articles/refugium-research/Copepod ecology under predation pressure, macroalgae trace element mechanisms, DOC dynamics, the refugium's role in competitive ecology and the microbial loop.Thu, 04 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/stability/https://riuttareef.com/en/articles/stability/A single measurement vs. trend, the paradox of constant adjustment, one change at a time, and why predictability matters more than hitting a perfect target.Thu, 04 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/substrate-practice/https://riuttareef.com/en/articles/substrate-practice/DSB, SSB or bare bottom — a practical comparison of three options, cleanup crew by substrate type, and the middle ground to avoid.Thu, 04 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/substrate-research/https://riuttareef.com/en/articles/substrate-research/Sand's redox stratification, anaerobic denitrification zones, H₂S chemistry, meiofauna and Jaubert's plenum method.Thu, 04 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/carbon-dosing-practice/https://riuttareef.com/en/articles/carbon-dosing-practice/When carbon dosing is justified, comparison of carbon sources, the Tropic Marin product family by PO₄ level, dosing, risks and how to prepare for them.Wed, 03 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/carbon-dosing-research/https://riuttareef.com/en/articles/carbon-dosing-research/Two distinct biological mechanisms, DOC's effect on microbiome composition, biopellets and PHB, and the questions science cannot yet answer.Wed, 03 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/dinoflagellates-deep-dive/https://riuttareef.com/en/articles/dinoflagellates-deep-dive/Why dinos are opportunists not invaders, Shewanella bacterium's algicidal activity, Dictyota allelopathy, ovatoxin biochemistry, cysts and why the biological control system collapses in aquariums.Wed, 03 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/dinoflagellates-practice/https://riuttareef.com/en/articles/dinoflagellates-practice/Species identification with a microscope, two treatment strategies (swimmer vs. sand dinos), UV sizing, silicate treatment, Ostreopsis safety warning and relapse risk.Wed, 03 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/ph-basics/https://riuttareef.com/en/articles/ph-basics/The logarithmic scale, diel variation, safe range, indoor CO₂ as a hidden cause, and why an electrode is the only reliable measurement tool.Wed, 03 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/ph-practice/https://riuttareef.com/en/articles/ph-practice/The air test, causes of low pH in order of frequency, all raising methods compared, electrode calibration, and a monitoring schedule.Wed, 03 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/ph-research/https://riuttareef.com/en/articles/ph-research/The carbonate system's three forms, aragonite saturation state, the vital effect, the Bourake paradox, and ocean acidification in aquarium context.Wed, 03 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/water-flow-practice/https://riuttareef.com/en/articles/water-flow-practice/The turnover rate myth debunked, flow's five biological functions, species-specific needs, gyre setup, dead zone diagnosis and coral behaviour as a flow indicator.Wed, 03 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/water-flow-research/https://riuttareef.com/en/articles/water-flow-research/Diffusive boundary layer as a bottleneck, Shapiro 2014 ciliary paradigm, colony morphology as a flow modifier, gyre hydrodynamics and open research questions.Wed, 03 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/alkalinity/https://riuttareef.com/en/articles/alkalinity/What alkalinity is, why it depletes, reference values by tank type, measurement methods and supplementation from kalkwasser to calcium reactors.Tue, 02 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/allelopathy-practice/https://riuttareef.com/en/articles/allelopathy-practice/Allelopathy in the reef aquarium: where it comes from, how it manifests, and how to manage it with activated carbon, ozone and placement.Tue, 02 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/allelopathy-research/https://riuttareef.com/en/articles/allelopathy-research/The biochemistry of allelopathy: terpenoid structure, the cembranoid family, macroalgal isoprenoids and the mechanism of action at the coral cell level.Tue, 02 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/calcium-basics/https://riuttareef.com/en/articles/calcium-basics/What corals are built from, why calcium depletes, magnesium's role in the calcium system and what happens when calcium drops too low.Tue, 02 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/calcium-practice/https://riuttareef.com/en/articles/calcium-practice/Target values by tank type, the calcium-alkalinity relationship, measurement methods, dosing options compared and signs of imbalance.Tue, 02 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/iron-dinoflagellates/https://riuttareef.com/en/articles/iron-dinoflagellates/Why the absolute level of iron is a misleading starting point for managing dinoflagellates — the competition model, biological mechanism and practical steps.Tue, 02 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/magnesium-basics/https://riuttareef.com/en/articles/magnesium-basics/Why seawater contains so much magnesium, its role in aragonite crystallisation and calcium solubility, and how its depletion shows up in the tank.Tue, 02 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/magnesium-practice/https://riuttareef.com/en/articles/magnesium-practice/Target values by tank type, why magnesium falls, dosing and correction, and signs of problems and impure salts.Tue, 02 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/microbiome/https://riuttareef.com/en/articles/microbiome/What the microbiome is, what it does, how DOC and oxygen drive microbial balance — and why the hobbyist's daily choices affect it more than most realise.Tue, 02 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/par-meter/https://riuttareef.com/en/articles/par-meter/What PAR and cPUR measure, why LED lighting requires measurement, species-specific reference values and the principles of light acclimatisation.Tue, 02 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/phosphate-basics/https://riuttareef.com/en/articles/phosphate-basics/What happens when phosphate is absent, what happens when there is too much, the target range, measurement methods and three rules to remember.Tue, 02 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/phosphate-deep-dive/https://riuttareef.com/en/articles/phosphate-deep-dive/Phosphate forms in water, phosphate as the cell's fundamental molecule, the one-way path into the skeleton, calcification inhibition biochemistry, particulate phosphate and Liebig vs. Redfield.Tue, 02 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/phosphate-practice/https://riuttareef.com/en/articles/phosphate-practice/Target values by tank type, N:P ratio, GFO trace element removal data, raising and lowering phosphate, and the zero-zero trap from a phosphate perspective.Tue, 02 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/ro-di-water/https://riuttareef.com/en/articles/ro-di-water/What Finnish tap water contains, why zero TDS does not mean clean water, how an RO/DI unit works and where its limits lie.Tue, 02 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/water-flow/https://riuttareef.com/en/articles/water-flow/Why turnover rate is the wrong metric, how to measure flow velocity in cm/s, the gyre principle and species-specific flow requirements.Tue, 02 Jun 2026 00:00:00 GMThttps://riuttareef.com/en/articles/big-three-in-practice/https://riuttareef.com/en/articles/big-three-in-practice/The interdependence of alkalinity, calcium and magnesium, target values by tank type, measurement methods and signs of imbalance.Sun, 31 May 2026 00:00:00 GMThttps://riuttareef.com/en/articles/cleanup-crew/https://riuttareef.com/en/articles/cleanup-crew/Selecting, sizing and timing the cleanup crew: snails, hermit crabs, urchins and sea stars in the reef aquarium.Sun, 31 May 2026 00:00:00 GMThttps://riuttareef.com/en/articles/cycling-process-basics/https://riuttareef.com/en/articles/cycling-process-basics/The basics of the nitrogen cycle, nitrification microbes and what actually happens biologically during the cycling phase.Sun, 31 May 2026 00:00:00 GMThttps://riuttareef.com/en/articles/cycling-process-practice/https://riuttareef.com/en/articles/cycling-process-practice/Step-by-step cycling protocol: filling, seeding, monitoring, ICP test and equipment startup.Sun, 31 May 2026 00:00:00 GMThttps://riuttareef.com/en/articles/trace-elements-overview/https://riuttareef.com/en/articles/trace-elements-overview/The biological role of trace elements, the most important ones, and ICP-based dosing in the reef aquarium.Sun, 31 May 2026 00:00:00 GMThttps://riuttareef.com/en/articles/zooplankton-phytoplankton-practice/https://riuttareef.com/en/articles/zooplankton-phytoplankton-practice/Practical protocol for seeding, dosing and maintaining phytoplankton and copepods in the reef aquarium.Sun, 31 May 2026 00:00:00 GMThttps://riuttareef.com/en/articles/zooplankton-phytoplankton-research/https://riuttareef.com/en/articles/zooplankton-phytoplankton-research/Plankton biology, copepod fatty acids, the microbial loop and the ecological significance of heterotrophy in the reef aquarium.Sun, 31 May 2026 00:00:00 GMThttps://riuttareef.com/en/articles/ammonium-urea-nitrogen-sources/https://riuttareef.com/en/articles/ammonium-urea-nitrogen-sources/The biological advantages of ammonium and urea as nitrogen sources for corals, the scientific research base and EU-market products in spring 2026.Sat, 30 May 2026 00:00:00 GMThttps://riuttareef.com/en/articles/nitrate/https://riuttareef.com/en/articles/nitrate/Nitrate's role in the nitrogen cycle, reference values by tank type, managing the nutrient pair and avoiding the 0/0 trap.Sat, 30 May 2026 00:00:00 GMThttps://riuttareef.com/en/articles/saxby-principle/https://riuttareef.com/en/articles/saxby-principle/Why reefkeeping is not about keeping animals but about keeping water, and what this means in practice.Fri, 29 May 2026 00:00:00 GMT