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This is my first year with the pool, but I have kept up with chlorine. Opened the pool today to add chlorine to be surprised by cloudy green water. I just tested and got FC-5, CC-0. CYA is 40, pH 7.8. Is there anyway I could get algae with my FC never dropping below minimum? I'm guessing I have...

Previous posts and the wiki say 250-350ppm for a plaster pool without SWG. The new pool school recommendations are 350-550ppm, which is a huge difference. Which level is correct, or why did the recommendation go up so much?

I need to do a partial drain to reduce CYA and just got my well water test back. Is this ok to directly fill the pool with? I am assuming the previous owners just used hose water and it looks ok. There is a softener in the house, though I'm not sure it would be ok to pull 10k gallons through it...

I am going to install a new variable speed pump (probably an intelliflo). They want you to use their breaker that is $45 more than the Siemens equivalent that I haven't been able to tell if there's even a difference. My bigger question though, is I have a GE box in the equipment room currently...

Hi, I am looking to update equipment from my 1970's 20-22k pool. I'm going to get a Superflo VS or (more likely) an Intelliflo VS pump and was planning on an SD80 3.5sf sand filter. Searching around, it looks like a better recommendation is a TR100 4.9sf filter. The SD80 can be had for under...

It looks like these filters have been out for 10 years, but there is surprisingly little information anywhere about them, including here. Instead of the laterals having slots, they're covered with some material to filter finer than the sand. Does this get clogged quickly by everything that gets...

Hi, we just moved into our new house this weekend and uncovered the gunite pool. 2 months ago we had it inspected and they noted a pH of 7.5 and Cl of 10 and apparently that's all they tested. Today, with a TF-100 kit, I got: 7.5 pH 1.5 FC 0.5 CC 300-325 CH 110 TA >100 CYA (~1/8" over) We are...

Hi, I am planning on replacing a 1978 pump in the new house we just bought. I'm not even sure what plumbing size is, it looks like it's 2" coming out of the ground for the return into the pump, but then it's 1.5" out of the pump and transitions back and forth a few times. It is an 18K pool...