Pond 15'x15'x4.5', well water, goldfish, 2 diy filters, about 50 goldfish, staying in a kids swimming pool, with a small pump right now. Last 2 years, not able to do alot to the pond, not even cleaning filters - due to illness. Finally, able to get some help, and the last 2 weekends, drained and cleaned the pond, was hard because high ground water was lifting the bottom. Getting water delivered today. I have a trickle tower that needs new media - any suggestions. Also, was looking at filters with uv, and being retired, am on a tight budget. Home depot has one rated for 1200 gals that could fit in the budget right now. I know it is small, but would it help with the green water that I am expecting. Any suggestions would be greatly appreciated.