Trying to help out a friend. After talking to the local pond store, i have been on a regimen of PH balancing by checking and adjusting the ph weekly. If I keep up with it I still have to put in PH Down weekly. I use Algae Fix weekly and monthly use water soluble bacteria packs. Cannot get the water to clear up. Any thoughts?? Top 2 ponds stay in the sun most of the day while the lower pond is in the shade by noon. Only filtration is a Savio skimmer in the bottom pond.