Browse practical aquarium articles related to water quality.
The water change is the single most important maintenance task in fishkeeping. Here is how to do one safely, how much to change, and how often.
How to acclimate new fish: floating versus drip acclimation, how long each takes, why you never pour bag water in, and how to cut transfer stress.
How to lower ammonia, nitrite and nitrate in an aquarium. Why ammonia is an emergency, how pH and temperature change its toxicity, and what to do first.
Most new-tank fish deaths come from skipping the cycle. Learn what the nitrogen cycle is, how to start it, and exactly how to know when it is finished.
How many fish can you keep? Why the inch per gallon rule fails, and how to stock by bioload, adult size, swimming space and filtration instead.
How to set up your first aquarium step by step: tank, equipment, cycling and adding fish safely, with a realistic timeline and an honest budget.
Why your aquarium has algae, by type: green water, brown diatoms, black beard and hair algae. What causes each one, and what actually clears it.
