Aquarium Care - Aquarium Answers

Something Wrong With Your Tank? What to Check, In Order

When you cannot name the problem yet, the order matters more than the answer. Stabilize, test, inspect, observe, then route to the right guide.

How to keep a water test log that is actually worth the effort, what to record beside the numbers, and the patterns six weeks of readings reveal.

Act on the reading that implies the safer action, then resolve the conflict with a control sample. Here are the causes and the tiebreaker.

Cycling, newly stocked and mature tanks need three different routines. Here is which parameters to test how often, and when to test off-schedule.

Sources give different tropical ranges because tropical covers many species. Here is how to set a temperature for the fish you actually keep.

GH is minerals, KH is buffering, and the names are misleading. Here is the difference and the three cases where these numbers actually matter.

A steady pH that is slightly off a chart is safer than one you keep correcting. Here is why, what KH has to do with it, and when it matters.

Zero nitrate has five common explanations, from a tank that never cycled to a nitrate test that was not shaken. Here is how to tell which is yours.

Nitrate is not meant to be zero. Sources disagree on the ceiling, so here is what the disagreement means and why the climb rate matters more.

Nitrite stops fish blood carrying oxygen, so fish can suffocate in a well-aerated tank. Here is what it does, what to do now, and where we stop.