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Thanks! I know they have been keeping the pH at the low end of the range. I’ll ask whether Cal Hypo was used, and I’ll periodically monitor the fill water CH.

Thanks! The good news is that we had a lot of rain this past week (~8”) and the pool CH fell from 1125 to 850. That’s almost a 25% reduction, with more rain on the way. Seems much better than expected since the rainfall contributed well under 25% of the pool volume. I did my CH tests twice...

Here's what I'm considering: Perform an acid wash to remove the majority of the scale, then drain/replace the water to achieve the target CH and then install a water softener in-line with the pool autofill. I can sample the autofill CH ~monthly to know when to recharge it. I understand an acid...

Here's what I'm considering: Perform an acid wash to remove the majority of the scale, then drain/replace the water to achieve the target CH and then install a water softener in-line with the pool autofill. I can sample the autofill CH ~monthly to know when to recharge it. I understand an acid...

Thanks, Allen - that is very helpful!

I suppose I could install a small water softener in-line with my pool’s auto-fill, to prevent more calcium from entering the pool. If this seems reasonable, then perhaps I’ll pursue the scale removal/water replacement process in the hopes of not having to do it again.

Here’s what the pool service manager had to say about the scale: - The majority of pools in my area have a high CH (concentrated due to evaporation over a few years) - They test CH ~monthly - Draining the pool and refilling it is quite expensive in our area (my pool cost $3k to fill 5 years ago)...

I believe the surface is smooth (at least no rougher than the plaster, which has quartz in it). If it’s important, I can brave the cold water and check where it is the worst (on the bottom) with my feet next time I’m there. I’ve seen a few small thin flakes that my pool robot picked up, which...

Thanks! I’m wondering what the process/sequence should be re: scale removal and water replacement. Since the water needs to be replaced, it seems a no-drain acid wash is the wrong way to go… opting instead for draining the pool, then some process to remove the scale, then refill. At this...

Thanks for the analysis and references, Allen! The spa had a dead bird in the spa skimmer basket, which I removed a week ago, not sure if that explains the spa FC and CC levels (the pool service 3 days ago *should* have fixed it). The service uses liquid chlorine in the spa (and until ~a month...

I have owned a pool and spa for a few years, and delegated all routine maintenance (including water chemistry) to a weekly service. This is a 2nd home, and we were usually here just on weekends before I retired. Now that I am retired and we are spending more time here, I figured I should...

Wired the fireman’s switch to the 5A relay today, and it works perfectly. Thanks again! 😀👍

Yes, the skimmers (2 in pool, 1 in spa) stay quite busy between Aug and Nov when the redwood trees shed their old growth and the deciduous trees drop their leaves. My Dolphin Premier arrives today to replace an old pool sweep, will see how it handles the debris that makes it to the bottom.

If you’re referring to ours, the answer is that we get some. About 1/3 to 1/2 of the pool gets sun during the summer between ~10am and 4pm as the tree shadows slide across. Results in limited natural solar heating, so I need to crank up the heater the day before we plan to use the pool.

Not sure if this is still going on… just joined a couple days ago… Oops - I just read the contest rules, I see I am well past the deadline 🙄.

Thanks, Allen - both for the great solution and the references 😀.

On a couple of occasions this past winter, my pool heater decided to turn itself on (we normally only use it when we plan to use the pool). We were away from home both times this happened, so it ran for several days before I discovered it. After the 2nd time (and an expensive gas bill), I...

Thanks! I put these on my reading list. It seems most members on this forum have a consistent signature block format - is there a tool that generates this, or do I just cut & paste then edit?

Just joined this forum, after being led here via a web search on pool robots. I’ve had a pool & spa for the past 5 years (via a home purchase) and have been using a weekly service for most everything. I recently retired, so am starting to take more control of some things, like replacing a worn...