I have a 9 month old female and the other 2 are 14 months. Should I not put my little 9 month female in with the older girls. Maybe that way only 2 females will be in the 25 gallon. Maybe I have no problem buying another tank it is all the stuff that goes along with it eg. Screen lid, furniture, more cleaning. etc. I was trying to keep as much space as possible for the babies. Well I will have to work out something I guess! Thanks for all your help.