Setting up nanonano tanks...
My son wants to do a fish hybridization project next semester and thru the summer. I was thinking of using guppies and mollies (small size, short generation interval, will cross, easy to breed) and keeping them individually in upright 2L bottles (connected to a central pump/filtration system).
Thought about platys and swordtails but too big? Anybody keeping these in a half gallon?
What plant would be best to let float in each bottle? Are there any small egglayers I could use?
Thanks for any constructive advice. I've never kept tiny tanks!