20 ball fish tank: Mouth diameter about 13 CM bottom diameter about 10CM maximum diameter about 20 CM height about 16 CM suitable for three to four small goldfish
25 ball fish tank: Mouth diameter about 17 CM bottom diameter about 14CM maximum diameter about 25 CM height about 19 CM suitable for four to six small goldfish
30 ball fish tank: Mouth diameter about 20.5CM bottom diameter about 15CM maximum diameter about 30 CM height about 21 CM suitable for raising five to eight small fish
35 ball fish tank: Mouth diameter about 22 CM bottom diameter about 21CM maximum diameter about 35 CM height about 26 CM suitable for raising six pieces ten pieces small goldfish
40 ball fish tank: the mouth diameter is about 23 CM and the bottom diameter is about 22CM. The maximum diameter is about 40 CM and the height is about 26 CM. It is suitable for raising 10 to 16 pieces. Small goldfish
45 ball fish tank: Mouth diameter is about 25 CM bottom diameter is about 45 CM height is about 27 CM suitable for raising 10 to 20 pieces small goldfish
50 ball fish tank: Mouth diameter is about 26 CM bottom diameter is about 50 CM height is about 29 CM suitable for raising 16 to 30 small fish