Thank you. i will try the fan
also here's a picture of them 3 months ago with some nice feathery gills. and they even got more fluffy than the picture too.
now they are all so tiny

(Don't worry about the small tank, they were only on the 10 gallon aquarium cos i wanted to get them a nice picture together. they are all in a much bigger aquarium) heheh just getting ahead before people say i was mean to put them in one small aquarium