This is assuming that you either have one type of Guppy or you do not care if they mix. Are you breeding them as feeders or are you breeding them for their beauty? different strains of Guppy will breed with each other if they are kept together.Lmreid71;1675554; said:So, no dividers in the tank to keep different batches seperate from one another, right? Just all together in 1 tank. So I can use one of my 10 gallon tanks for fry that are too young to sex & the other 10 gallon to put males & females in, but use a divider to keep them separate, right? Thank you so much for your help. I kinda new at this.![]()