For years now, pet stores have been selling goldfish bowls and telling customers that goldfish can live in them. This brings us to the following question. Do goldfish belong in bowls? This is false for many reasons. First, every goldfish needs at least 10 gallons of water. In order for your goldfish to survive, you also need great filtration and a healthy living environment.

The 10 gallons per goldfish rule. It's a simple rule but it is rarely applied. The fact that many big pet stores sell fish bowls and don't know much about fish in general is one of the major problems when it comes to an overstocked tank. Why goldfish need ten gallons of water can get a bit complicated. Goldfish are one of the messiest fish you can own. This is the major reason these fish need ten gallons. To elaborate, the waste they produce becomes ammonium which is very dangerous for any fish. If there's too much ammonium in your tank your fish will eventfully die. To get ride of the ammonium you can do two things. You can either do a water change or you can cycle your tank. The cycling of a tank is actually a natural occurrence. Your tank develops beneficial bacteria that can get rid of the...