haven't fed him a feeder in a while. like 4-8 weeks. i quit after i realized how much waste they produced.Pyramid_Party;2272881; said:If you been feeding him lots of goldfish, dont do it anymore. Goldfish are a cause of HITH, but I also heard cramped tanked help in causing it as well. Bigger tank, good clean water and a good diet are what will help you.