After 2 years, due to illness, cleaned out pond (15'x15'x4.5'). Water was green, and disgusting. Drained, cleaned out sludge, caught goldfish - even 1 year old babies, and put them in a kiddie pool. Got 2000 gal of spring water delivered, and got the DIY filters, trickle tower and a few other smaller pumps going. Water turned green, probably due to the hot weather. Purchased another filter with uv, and within a week, could see the bottom of the pond. Have some lilies and other plants that my daughter sent me. Put fish back in. DIY filters have batting in them, and need to be cleaned out every few days. Cannot do a bog filter right now. Water has a brown tint to it - figure it is dead algae. Besides the filters, is there anything I can add to help clear it up? Thank you