I prefer to use twenty longs as my breeder setups but have many 10 gallon breeder tanks, only apisto i havent spawned in a ten gallon tank was my Apisto Atahualpa, which only spawned once for me, and that was in a 20 long tank. i do like the size of a 15 gallon tank best. to me this is a perfect tank. Of course my favorite breeder tank is my 33 long tank, same length and width of a 55 gallon tank but shorter in height. Tens are good, 15's are better, 20 longs are best, but i've even spawned apistos in tanks as small as 5 gallon tanks. Which ever you can utilize the most is what you should work with. i've even seen borellis spawn in a 2.5 tank. I dont use any dithers in my breeder tanks, certainly never use corys in them either. I do put dithers in grow out tanks and do use corys in my grow out tanks. Appropriate sized dithers for appropriate sized fry. I also raised lots of killie fry with small apisto fry, neither competed for the others tanks area space. 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"!