Hello Francine I use mainly ten gallon tanks as my breeder tanks. I do use some 20 longs but this is for trios or quads. I like to use my 20 longs or bigger tanks for grow out tanks. My set up for my breeder tanks is fairly simple. I use 2 clay flower pots per tank, one for him and one for her, bare bottom tanks in most of the set ups, I do have a few tanks that have a thin layer of gravel. I use hydro sponge filters in all of the tanks, whether breeder or grow out tanks, I really love these filters, can't have enough of them and I have glass covers on all my tanks. I never used to think apistos were jumpers until this year. Good thing I had covers on 90% of the old tanks, now there's 100% coverage on all tanks. When you wake up one morning and find your only female Sunset and only female Trifasciata on the floor on the same day after never having a jumper before you decide to get the rest of the tanks covered. I do have a couple of 55 gallon tanks that have larger batches of juvenilies growing out in. Hope this helps out some. This is just the way I do things, everyones set up is different though John ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!