I mentioned on my introduction thread that we experienced a major die off in my pond. I have been strip testing the water, and all levels are within normal except water hardness (I'm on a well so I expect hard water) and alkinlinity, which is off the chart. The water under the falls foams like there is detergent present. All the dead fish are out of the water, and I've screened all the material I can, without draining the pond (4000 gallons). I'll keep strip testing thru the weekend, but what I wonder is could enough green matter blown into the water during the last storm to spike the levels? After a major water change, what should I be adding back to stabilize? Thanks in advance for your input. MD