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I have a Pentair Rainbow Model 300 trichlor feeder. (It only gets used when I'm out of town.) I haven't had it dialed on in months, but there is a drip leak on the outlet side tubing at the pipe collar going into the return line. I ordered a well-reviewed (always taken with a grain of salt) kit...

My spillover spa has a dedicated Hayward pump with a Century motor. The pump badge is too faded to get any information from, but I'm pretty sure it's an old Super. The motor is about ten years old judging from the previous owner's notation with a paint pen on the motor. Lately when I turn it...

I'm a new owner of an old pool. The seller replaced the roof before we purchased, and they let roofing nails sit in the water while the house was on the market. There are several nail-sized rust stains. I tried scrubbing one with a Vitamin C tablet and couldn't tell that it had any effect...

One of my diverter valves has a slow leak. I see several replacement parts available here. Should I go ahead and get the whole "upper valve kit" while I'm going to have the thing apart, or is there a fairly high likelihood that just replacing the o-rings will solve the problem?

I record my CYA as the best estimate that I can make based on when the dot actually disappears in my Taylor test. E.g., if it looks like it's 58, I record it as 58. I know that the advice is to assume that it's 60 for making calculations, but I think there's some (possible) value in tracking the...

I feel like this question must have been covered before, but I'm not finding an answer very quickly. I test and top off my chlorine each morning to the highest end (8 ppm) of TFP's recommendation for my current CYA level (50). As expected, FC drops 2-4 ppm each day — it dips out of TFP's ideal...

Background I acquired a new-to-me pool at the end of last season with CYA through the roof. (I refilled recently and that, of course, took care of that.) But before being hip to the TFP ways, I took a sample to a local (independent, I think) pool store. To be clear, this was before the refill...

I've seen the sock method recommended, and it seems to have some advantages. But is there any reason I shouldn't mix some up with pool water in a five gallon bucket with a paddle mixer and a drill? Would I be standing there mixing for hours or something? My main goal here is to get the CYA in...

My pump powers on but isn't moving any water. I can hear it humming when it gets power. I first observed the problem when I turned off the pump to check the strainer basket. It was working fine before I cut the power, and the strainer basket had only a few tiny leaves in it, so I turned the...