Two males and four females it is ,
I haven't got ones for these yet but I have got one with goldies in it atm, its something like 50cm x30cm x30cm (LxWxH)
Does reaching a marketable size mean they wont fit in goldfishes mouths?? :lol:
Reading a bit more from the internets I'm thinking of getting 3 containers, 4 males 8 females, then seperate the males and females for 1-2 weeks feed really well, then stick two trios in two of the containers fill with a lot of water sprite then once the females have laid their eggs remove them to the other container filled with more water sprite and see if they will breed in that as well