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Thanks for the reply! I don't have a salt water pool, but I assume the Protek Shield is still useful for me since you can see a "lot" of white looking stuff on the anode. Regarding my pool chemistry, I will get those numbers. I have read through the ABCS of Pool Water Chemistry a few weeks...

I have the Raypak 336k heater which I installed in May. I really haven't been paying attention to the Protek Shield until today where I can see a significant amount of corrosion. I think this is due to me not staying on top of my water hardness as we have very soft water in our area. I'm...