consider investing in a high-grade filter. The right size, strength, and brand will depend on many factors, including your fish tank’s gallonage. As a rule of thumb, a 20-gallon fish tank should ...

Endler's don't need a very big tank – a 20-gallon is more than enough for around four of them, but you'll have to increase the size if you add more fish. They like high pH water, can tolerate a pretty ...