To many pages so didnt read past the first post...
Do you have a sump? If so, put them in there.
Also, you are planning on doing water changes on the 11gl tanks (if u go that route) with used water? That dont sit right with me. I would just use tap (depending on your city water source) or fill something up with tap water and let it sit (ie: the 30gl you will be using when they are bigger) and use that water for water changes.
I like the sump because it has active water (giving your fish a 24/7 work out) and it should be very clean for babys. My sump is a standard 60gl and half is a sump (bio balls/ceramic rings blah blah) and the rest of it is just free water (maybe 30 glns worth) just as a grow out tank. If u want a pic, ill post one for you later tonight.
just my 2cents
Just seen the pics after I posted... They look nice and fat