08-24-2011, 01:55 AM
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I would say it's either to strong or they are just not use to it, just because it's doesn't feel strong to your hand doesn't mean it's not to strong for your little fish. You can by a thing at the fish store or walmart can't remember the name of it right now but it allows you to control the air flow you just put it in line of your tubing. You could also try to leave curtain on for a while and see if they get use to it. What size tank is your air pump rated for? When I had bubble curtains I left them on all the time.