hi, i'm kinda new to this fish hobby, and i'm still planning out how my aquarium should be. i've considered zebra dsanios and corys, but I saw that guppies are pretty interesting too. the other day I saw a good deal for a 15 gallon tank and I don't know if it's enough room for 4-5 guppies plus possibly a coulple of corys ???. and do guppies eat algae wafers?