The filter is the most important piece of equipment on your tank, and what goes inside it does more for your fish than almost anything else. Yet filter media is where beginners get the most confused, partly because manufacturers sell single-use cartridges that quietly...
Cloudy water is one of the most common things a new aquarist panics over, and most of the time the panic is unnecessary. The trick is knowing which kind of cloudiness you’re looking at, because the fix for one is the opposite of the fix for another. White haze,...
The most dangerous moment in a fish’s life is the trip from the store to your tank. The water in that bag can differ from your aquarium in temperature, pH, and other parameters, and a fish dropped straight into different water can go into shock and die within a...
Fishkeeping is really water keeping. The fish are just the part you can see; the part that keeps them alive is invisible chemistry happening in the water around them. Beginners who learn to read a handful of parameters skip past the trial-and-error stage that costs...
An ammonia reading above zero is one of the few true emergencies in fishkeeping. Ammonia burns gills, damages fins, and at high enough levels kills fish outright, so when your test kit shows color where it should be clear, you act first and diagnose second. The good...
