What are their growth rates? Will they be able to handle the heat from fish such as Central and South American cichlids? Dovii, Jags, Red Terrors, and Umbee to be exact, possibly some viejas and midas too. The pond will be around 1000 gallons, 10' diameter and 30" deep.
Two of them are around 5", the other two are around 3"-4". Initially had them in with my jaguar and vieja grow outs in the 55 gallon. But they were harassed so much that they looked like they were gonna die, so I tossed them out into the temp pond where my red terror, giant danios, pleco, and jd live. All 4 are still alive, I see the larger one chasing the danios occassionally, though he has yet to eat one. 