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I haven’t added anything recently except muriatic acid and liquid chlorine occasionally. No work recently. It did have pebble tech applied 2 years ago and I added borax a year ago (~50 ppm). I’ve never used any clarifier or floc.

Does recognizing what this is in my pool depend on my pool chemistry? I thought someone might have experience with it and asked for help. I knew that I needed to add acid and chlorine but gave you my reading a la minute .

I know I’m not a TFP expert but I have been a member for over 10 years and pay for and use the pool math app to record all my testing and chemical additions etc.

I put it in vinegar and it did not bubble

I do add acid to keep my pH down and am adding a gallon today, even so my CSI is not out of an acceptable range. I always have liquid chlorine and will add. However the white substance is NOT calcium scale. I know what my water chemistry should look like.

FC 0.6 pH 8.0 TA 80 CH 420 CYA 0 Salt 3400 Water temp 87 CSI 0.43 I knew the chlorine was going to be low because I’ve been having problems with it. The CYA being 0 makes no sense. I don’t test very often for it but last time I did it was 80. The pool has not been drained or even used much...

I’m getting white “flakes” as well. They are most noticeable in the spa where they settle into a pile. They are gel like and clump together when retrieved from the bottom.

Hi. So I have installed a new Main PC board Hayward sent me, 2 new rectifiers, checked all voltage & amps against the trouble shooting guide, including the transformer, then we put the T-15 in a bucket with pool water and run the system ( dummy cell in place). I reset the recorded salt level...

You are correct, I will contact Hayward for a replacement board. Just past warranty but I filed a warranty claim in the 1st 12 months stating I felt the boa4d was bad. They sent a warranty tech, he said bad cell, replaced it & charged $85 for the call, seemed better for a few weeks then low...

Hi. I think the 5v was when it was off. I get 29 or 30v when on I went through every test I could see in the Hayward trouble shooting guide And seems the numbers I got matched what it said I should get. that guide didn’t show a test for the cell “ Plug” on the board so I tested pins the top 4...

White & gray were switched ( not white & violet)

Hi. I checked DC amperes at both the black and red wires and the reading matches what the diagnostic reading is on the system ( meter reads consistent 1amp less than the panel reading) I switched from + and - . the problem is still there. I check volts at cell and shows about 5.5v going to cell...

Hi. I replaced Both rectifiers and unfortunately it didn’t change anything. I am suspecting the “ new T-15 for warranty replacement “ the warranty tech installed Aug 2021 may be bad. Is there a way to test the cell directly with a multi-meter?

Ok, I’ll try the full wave ones and let you know what happens. Thank you again for your help!

Hi, I purchased the GBPC 3510 (1 Phase 1,000v 35a) & KBPC 3506 (600v 35a full wave) rectifiers. The existing ones I am replacing are GBPC3504-6415 and GBPC-3504-6375. Which new one replaced which old one , can use your help. Trying to get specs on the old ones but no Luck yet. Thank you Back...

Ok, I’ll pull it apart when the parts arrive & inspect thoroughly & send pics. The plug socket came to mind and I’ll check it as well. would a relay issue be just off/on versus a low amp reading?

Hi, my amp meter is not working very well so I just ordered The two rectifiers which will arrive next week ( thank you for the links). I’ll replace them and keep my fingers crossed that fixes the issue. I’ll post after

Hi. Thanks I was away. I will test and then pull the board and look at the back, and reply with what i find. Thank you for your help. the most info I have received from anyone is 4 years. I was thinking it might be a rectifier due to the swing in (-) vrs (+) amps

system consistently reads 600 to 800 ppm below confirmed actual Also, when I reset instant reading & countdown then settles. The (-) is consistently 1/2 or less of the (+) reading as follows; also note big difference in amperes, these should be the same Values just reverse. a) -27.2v. -3.9amp...

Thanks all. Bringing my FC up a bit and just trying to watch the pH. I really like the spa spillover but going to cut that down for now. I'm going to keep track of how much MA I'm adding in a week and report back. I'm thinking at least a gallon....