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Today's test results: 2.0 FC 0.0 CC 7.6 PH 50 TA 300 CH CYA under 30 I've got floating white material on the pool surface. Everything seems to be in order with water chemistry. I've read on google that this is white mold, but not a lot of amazing threads here that match what I'm seeing.

See attached photos. I stripped out my pool's old sealant a couple years ago and applied Vulkem 45 SSL into the expansion joints. I filled in the gaps with some foam backer rods before applying the Vulkem. I expected the sealant to do a better job of adhering to the adjacent slabs, but in many...

My indoor pool has low FC. Using taylor FAS-DPD test, I have to put about four heaping scoops of R-0870 into my 25mL sample in order to see any tinge of pink, and not the usual dark pink I'm more accustomed to seeing. Do I need to keep adding more R-0870 powder until it turns a darker pink in...

My indoor pool/deck is approaching 50 years old. It's in pretty OK shape (I think?), all things considered. That said, I'm sure we need to start maintaining it more than we have. The only work I've done is replace caulked joints with some Vulkem caulk. I'm not super happy with several spots we...

Backstory: I wanted to increase CH from 150, and did that by adding calcium chloride (sprinkling in deep end, brushing afterwards). Now the CH is 210, so that's fine for now. While brushing my deep end (something I hadn't done since I've owned the pool across the last 5 years), I am wondering...

I'm completely new to dealing with plumbing in swimming pools, and have next to zero plumbing experience otherwise. That said, I'm still going to try and give this a go. I need to visbily check the sand in my Tagelus TA-60 filter. I have never done anything with the filter, in the five years...

I've read several historical threads here on this topic, but still don't have a clear idea on what my next steps are. My 4yo child has pooped in the pool. From what I can tell, it doesn't really matter what "type" of poop it is -- if the feces contacts the water, it's time to shock/SLAM. Our...

I've read many historical threads on this topic. Adding to the "return stream" is a common method. If my pool has three return streams, does this impact my approach?

Today, I accidentally scooped DPD powder using a non-dry dipper spoon. Is the DPD powder rendered useless at this point, or can I try and save it by leaving it exposed to dry air for some time? Yes, I will need to make sure it's out of reach to kids/pets.

I've partially drained and refilled my pool three times over the last 2+ weeks, to solve a high (roughly 250ppm) CYA problem. Other stats prior to first drain: TA 104 (not sure how I came to this number since the K2006 kit only goes in multiples of 10) FC 2.4 CC 0.4 pH 7.4 CYA ~250 CH didn't...

Can anyone identify what this is? In the past 11 days, I have twice done a partial (40%) drain and refill of my pool, so I'm wondering if this is some kind of algae (or something?) buildup. My pool water otherwise looks fine. I haven't added chemicals yet - I have a broken glass problem that I...

I had no idea broken glass in the swimming pool is potentially one of the biggest problems as a pool owner. This explains why I thought it was reasonable to try and perform chemical measurements using a glass bowl/measuring cup instead of non-glass. Anyways, I've got a fair amount of broken...

I noticed the rings on the attached photo after draining the pool about 40%. I know next to nothing about the construction of my pool, other than it's from the 70s and this is the first time I've drained in in the five years I've owned it. Anything to be worried about here?

I've got an indoor pool, about 30k gallons that I've owned for 4+ years. The pool itself is from the 1970s. I'm currently having problems with ensuring the chlorine and pH are consistent with how I've maintained the pool over those 4+ years. I've been using Poolmaster OTO and Phenol Red to...