I have some RETF tadpoles and they seem to be dieing right after there front legs come in. Im not sure what im doing wrong. I have plastic leafs in there for them to get up on. what can i do to stop them from dieing? He was at the bottom of the tank opening his mouth up fast do you think that they drowned? But it almost seems like there front legs arent developed enough for them to grab onto anything. Cause today his second front leg just poped out and a few hours later hes dead.