Water Chemistry for reef and saltwater aquariums.
Reef tank pH running low? Indoor CO2 is almost always the cause. Ranked fixes: fresh air, skimmer intake lines, CO2 scrubbers, refugiums, and kalkwasser.
The complete reef tank parameters chart: salinity, alkalinity, calcium, magnesium, pH, nitrate, and phosphate targets, plus a testing schedule that works.
Four reef salt mix types compared on mixed parameters, batch consistency, and true price per gallon — and how to match the bucket to your tank's targets.
Kalkwasser delivers balanced alkalinity and calcium while raising pH, for pennies. Learn the right mix ratio, drip-dosing safety, and its real limits.
Is ICP testing worth it for a reef tank? What mail-in lab panels really measure, what they miss, and the testing frequency that makes the cost pay off.
Raise reef tank alkalinity safely: the 7-11 dKH target range, baking soda and soda ash dosing math, and the 1 dKH per day rule that protects your corals.
Lower phosphate in a reef tank the safe way: targets of 0.02-0.1 ppm, GFO and lanthanum used correctly, and how to stop before you starve your corals.
Every proven way to lower nitrates in a reef tank, ranked by effort: feeding fixes, water changes, skimming, refugiums, and carbon dosing done safely.
RO/DI systems for reef tanks compared — 4-stage 75 GPD units, 5-stage dual-DI, compact apartment rigs, booster pumps, and the TDS meter that runs them.
Reef test kits ranked by the job: alkalinity titration, Ca/Mg combos, digital checkers, master kits, and low-range nutrient tests worth trusting corals to.
Dosing pumps for reef two-part compared — single-head, 4-head programmable, and WiFi dosers — with calibration habits and the ramp-up that avoids overshoot.
Falling alkalinity means your reef is growing. Learn where alkalinity goes, how to measure daily consumption in four days, and how to match dosing to it.
Alkalinity and pH are related but measure different things. Learn what each number means, how CO2 links them, and which one to act on when corals struggle.
Two-part dosing for beginners: measure your reef tank's alkalinity demand, calculate exact daily doses, and ramp up safely by hand or with a dosing pump.