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Thanks for the reply. I think the cover on the concrete for those 2 months with a hard freeze for a few days straight was the culprit as well. We intended on sealing that part under the cover yearly but I had no idea we should have done it in the fall before winter when it was only 5 months old...

We are on a well so no charge for water. If the water was diluted and the concrete was sealed perhaps with a better salt resistant sealer, why would there still be problems, because there are problems now that will just keep getting worse? What would be the correct fix for this whole issue?

Thanks for the link, very informative. They do have the concrete guy coming back out to fix it the first of March. I am hoping for a fix that will not be an eye sore and will match the rest. They poured the inner part surrounding the pool on 4/9, outer deck was poured later after the cover...

So you think this was not properly sealed, allowing water to get in causing the problem? I am looking for a cause and a solution. I would rather keep the SWG than switch to an inline chlorinator any day but I also do not want the deck to disintigrate or look awful every time we close the cover...

The sealer was Surfkoat Luster Sheild. I was curious if it was the sealer or perhaps needed another coat, but wow, to only last 7-8 months. We were really consistent about keeping the deck rinsed with the hose but I suspect when the cover closes it dips down into the water dragging some of the...

Thanks for your detailed reply. I would like to keep the SWG. I would also like to figure out a permanent fix for the concrete. This is really disappointing to have happen.

Thanks for your reply. I am hoping for a solution. I wonder what the solution to the eroding concrete under the cover will be? It was sealed and is not even a year old yet. Why would they make this type of cover if it will cause potential problems with decking or is this just the wrong type...

Muriatic acid but it was in check when we closed it. Do you think a high pH could've caused that since we leave the pump running even with the cover on?

Yeah, if I had known this was going to be an issue with this shape pool/cover, I would have gone with rectangle for sure. I will check the salt level tomorrow but it has never been high.

I have not tested the salt level lately but we have only added one bag in late August or early September after the initial start up when the SWG said it was low and the reading was low.

It is in three different areas. One near the skimmer, one by there you can see the robot in the water, and one on the curve where the covered tabled is.

Our fiberglass pool (14,000 gallon Latham Cancun) was installed summer 2021 with a Pentair Intellichlor SWG and VS Pentair pump. We have loved it. It is so easy to maintain correct levels, only adding muriatic acid to keep the pH level down weekly. We leave the pump running 24/7 and did not...