like i said previously i had like 10 feeder goldfish in there for a while...maybe a month...my gar stopped eating them and only ate pellets and **** like that, so i left them in there htinking maybe if hes hungry he will snag them, but they lived there for so long...I was told goldfish are like the dirtiest fish you can keep...anyways any tips or anythign on reducing it?? i leave for deployment in 2 days and my roomates are taking care of the tnak so i want to tell them specifically what they can do to get it back clear again