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Thank you all for the links.. I'll definitely do some research, get a test kit and start the SLAM process. I just want to triple check this pressure thing, though, and rule out any issues with the filter. So I understand it's normal for the psi to be high due to algae - but - shouldn't...

I do use a home test kit.. Taylor brand, K1005 I believe. My chemicals are definitely off. I had a local store test it yesterday: - Free/Available Chlorine 20ppm (from intense shock to clear the algae) - pH 8.5 - Added liquid muratic acid yesterday - Alkalinity - 65ppm (adding increaser today)...

I'm experiencing extremely high PSI in my sand filter (Sand Dollar SD60). I'll backwash and within an hour or so it's at 23-25psi and the jets are pushing little to no water out in the pool. I've replaced the sand, cleared the water of algae, cleaned the sand after clearing the water with a...