i was at the pet store a few weeks ago looking for a couple algae eaters to put in with my goldfish. the lady there said they will not live with the goldfish. she sold me a couple snails and a tadpole which she said will turn into a frog. its a big tadpole like almost 3in long. my question is when this thing turns into a frog does it need to be taken out of the watr or will it live in the tank? also is there any other algae eating creatures i can put in my fishtank?