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I don't have an overflow or an autofill. I just noticed my last data set had the wrong year (it's supposed to be 2019 and 2020). One of the things I wanted to confirm (which I think the responders have) is that evaporation plus refill will not result in a CH drop - if anything it will result...

I have not always measured at the same water level, I'm sure. But it should even out in the long run I would think. In the future I'll try to make a note each time on the water level - maybe I'll spot a trend there. You're right, I should probably be more conscientious about the color change...

Yeah, I was hoping for some chemistry explanation, but leak seems to be the best guess so far. The pool is going to be very busy this weekend, so maybe once things quiet down I can do a leak test. I don't want someone to splash water in the bucket, etc, and give me a bad result.

I don't know. But assuming it's non-zero it should raise my CH, not lower it.

No, no water softener. Yes, I did add water from my hose, but that would tend to increase the calcium in the water, not lower it. I have not had to drain the water due to the rain. I see other posts on TFP that say evaporation plus rain lowers CH. That may what's happening to me too, but if...

My pool is four years old, and the CH is always dropping. I had scaling in year two, but got rid of it (sanded it off - the calcium nodules were removed via the filter and the Polaris). I've had no scaling in year 3 or 4. Regardless, every year I've had the pool, my CH has always dropped...

I got full-strength muriatic acid delivered from zoro.com - one gallon was $9.76 which is not too out of line, though minimum qty is 4. I got one shipment in the spring and just ordered another.

Just to follow up, I did install this snubber on the transformer, but it didn't seem to solve my light sync problems. It doesn't seem to hurt, but doesn't really help with syncing. I'll probably leave it installed though, since it's supposed to help with surges so it might help protect the...

Yeah, that second document is the one I looked at that said "The snubber will keep the ColorLogic Lights from falling out of sequence with each other". The troubleshooting guide also mentioned the snubber but only claimed it would help with GFCI problems. I do have a GFCI circuit, but I don't...

I see this is a common problem - my lights seemed to work OK the first year (2016), but now they're just constantly out of sync. I follow the sync-up procedure from the Hayward docs (on-off, wait, etc), but it rarely works - one light is usually out of sync. I'm using Hayward ColorLogic LED...