i have found some info on stingray and rtc and that the rtc have to be 1/2 the size of the stingray and if they are together when young there is more likely it will work.
the pond is on hold now because of money , i will do it when i get a full time job in a couple of mouths , so that i can buy better things for the build and nicer stingrays.
would a Castexi and a flower be all right together