So my female guppy has gotten pregnant and I now have 19 guppy fry that are living with my betta and an adult guppy in a 20 gallon tank. Later I'm planning on moving them to a 40 gallon tank. Would it be ok if my betta were to live with 20 other guppies? I'm planning to separate the 40 gallon tank to different sections to prevent more breeding. I know that you shouldn't keep too many male guppies together or else they'll start fighting. Does anyone have any advice?