these are my 2 cents regarding MTSs, i have them in my endlers livebearers tank but they never seem to survive in my apisto tanks. i think it's due to the water being too soft and acidic so that they can't get the minerals for shell formation. if your water is appropriately soft and acidic, they shouldn't be able to survive there, IMO. tsuh yang chen, nyc ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@majordomo.pobox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@majordomo.pobox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!