Many years ago , before we even became dog owners, I bought a second hand aquarium from a bloke at work. We knew squat about keeping tropical fish so got books out of the Library and asked the nice people at the fish shop. However the first couple of weeks we had heavy casualties - it was like a fish holocaust. Eventually we either got the hang of it or the strongest survived and we even started getting baby fish. We didn't buy any more fish though- the balance seemed right, the fish were reproducing and we didn't want to upset it. At one point there were so many baby fish- we were giving them away.
Before we went on holiday I was giving the tank a clean and was surprised to count only 5 fish. The size of our tank could take 10 to 15 comfortably (when we were giving them away I counted 35). Yesterday we went to the Aquatic shop and bought 5 black widow tetras to join the platys. Touch wood, they seem to have settled in nicely.
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