Can I have 4 angelfish in a 10 gallon tank. I had a 26 gallon tank cycling but to my suprise and shock the rim fell off. Fortunately PETsMART gave me my money back. So now I have a 2.5 gal and a 10 gal. I am going to replace the 10 with a 20 gallon Xtra High. It would only be temporarily maybe a couple weeks or so.