Question: We put a pond in 3 years ago and had to put in an ultra voiet light to clear up the pond not working fast enough what is the next step? We have about 35 fish.
It sounds to me as if you have too many fish and you feed them too much.
Your possibilities are to cut down your fish population (probably the best way) or to install a huge filtration system (very expensive) plus your UV light. Even then it is possible your bioload will be too heavy. Maybe you have some friends who could adopt some fish?
The rule for fish load is 1 linear foot of fish per 25 square feet of pond surface.