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so there is no prevention? I did not have this issue before I replastered the pool.

here is an underwater pic. The vitamin C tablet removed the stain! what would be the best product to clear the entire area? some form of solid acid I guess?

put a tablet on it- didn't do anything. What else could it be?

it's hard to see in the pic- but there is a band of green along the bottom of the wall. Brushing and slamming did not help. Any tips?

the pool was re-plastered about 3 months ago. Since then the pH is constantly running high (8+). I keep adding acid- it goes down for a day or two and then back up. Any tips? CYA=40 TA=80 CH=325 FC=2

pool loses about half an inch a day. I have had a pressure test done and return lines do not hold pressure. Local companies charge about $500 to locate the leak electronically (repairs not included), which is just absurd. Do you know of any DIY ideas?

is this what you are referring to? https://www.homedepot.com/p/1-1-4-in-x-1-1-2-in-Rubber-Test-Ball-Plug-270016/100130312

problem is, the threaded universal wall fitting is buried in the pool wall- so I only have access to the quick-disconnect end. Basically, I need something like this: https://www.poolzoom.com/eyeball-fitting.html with no hole. I tried filling the hole with putty, but the whole eyeball pops out...

I didn't measure the calcium prior. I will do that next time Reading about the CSI, I realize there is another factor here: temperature. I have been keeping higher temperatures than I used to. That combined with a high pH may have been the curlpit (the ozonator is just a coincidence)

nope

I misunderstood your question- I just flushed the water 6 weeks ago. No ahhsome

thanks all. Is Ahh-some effective for calcium scale? (assuming that's what I am dealing with here)

I used a whirpool cleaner product a year or two ago (had to remove the filter and all that). Did not see any scaling come loose

old cell is gone so not sure how it would get in? high calcium has not been an issue before. The current calcium level is very low, which makes me think something is solidifying all the water calcium. also the pH has been on the high side lately.

fiber glass portable spa. I'd say flakes with some thickness. Didn't cut any pipes- there was an old ozone generator already. just replaced it

does not crumble easily. Fizzles and dissolves in acid

6 weeks ago. I made sure to vacuum all the white stuff from the bottom

A few months ago I installed a new ozone generator. Since then there are heavy, white particles (size of kosher salt) at the bottom of the spa. I thought it would be gone by now but there is no reduction. Calcium level is 70ppm. Any ideas how to fix?

thanks- I will do that and report. Soaking the grids in acid and TSP sounds like a huge pain- I may just order new grids if it comes to that.

what I meant is that immediately after backwash (or full clean), the pressure is around 22psi (when I first got the filter, it was 20, so "clean" pressure has not changed much). Problem is, it raises very quickly after that to 27-28 psi (it used to take longer)

I see. The clean pressure has gone up slightly over 3 years (maybe 2 psi) so it's probably not the grids....

what do you mean by clean pressure? the polaris pressure goes down when filter pressure goes up.

when I first got my DE filter, I could go 2-3 months before backwashing/cleaning. But nowadays (3 years later) I have to do it every 3-4 weeks (judging based on pressure gauge as well as loss of polaris power). Is there any reason filter would need cleaning more frequently than before? (I do...

my current marcite finish is peeling off- which means it is not adhered to the pool anymore. If they just put a new layer on top of it, would it not come off together? or would they grind away the existing marcite before resurfacing? (I don't think that would be common practice)

I have been trying to raise TA from 30 to 80 by adding a couple of pounds of baking soda at a time- and it is progressing very slowly. I believe the reason they recommend not adding a lot is to keep the pH from raising up too high. Is there a way to raise TA more quickly? e.g. add a lot of...

in the past I have been using liquid chlorine and it has been stable- so I don't test that often (except for FC). Recently I had to use more tabs because of frequent travel. would you recommend adding a whole bunch of baking soda?? I have never seen the TA this low.

My pH was under 7, so I added 2-3 pounds of soda ash. The pH went up to 7.6- however the TA dropped from 80 to 30! does that make sense at all?