You could put an air stone in or a little fountain to splash some water to help oxygenate the water.
id10t;907030; said:More water lettuce could help... my 5 acre pond got covered with it, choked it out, only "good" part is that it *really* cleared the water up...
You can make a UV sterilizer with just a black light and some way of getting water past it...
graham;907702; said:I have two waterfalls and a powerhead, and an airstone with air pump going. They are still right at the top getting air. The water isnt really getting any clearer. I have had 2 fish die in the past day
Oh, and to make things worse it looks like they are getting ich. I put some ich cure in, hope it helps.