No more feeders dude!!!! Your fish will eventually get sick and die if you keep doing this and it sounds like you do it often. Not to mention the fact that they are not getting the nutrients they need so you could be stunting their growth. If your tank is large enough then I would add a couple of SD's to it but if it's only 80 gallons then I don't think it is. Make sure your heater is working as well. Cold temps will make them sluggish.
