So i want to start with about 15 baby cons in a 35gallon. I would like to grow them out until i can see their pairs, then seperate off each pair into a 20 gallon. Will it be ok if my 35gal growout it barebottom? i know they need gravel to breed but will it be ok to not have gravel if they ar not breeding yet? Also, should i get another tank to seperate the babies from the parents when they hatch? Should that have gravel?