Fibre Pool and high ph cause osmosis and stain?

[nodiaque]

Hello everyone,

I adopt the TFP way this year and my water is as clean as ever. I'm into a facebook group of people owning fibre pool. Lots of them have the same brand as me (fibro) and after 2-3 years, stain started to appear and some even have osmosis problem. For the stain, a lot of people says to lower PH to 7 and use a stain remover product from the pool company. After, they say to maintain PH at 7-7.2 to prevent stain and osmosis.

I haven't found anything on this in the pool school and the pool math tell me to be in 7.6-7.8 range for my ph. I currently do have some very small stain spot and pinhole that feel like rust that I have to check. When I tried to rub with my finger, it doesn't bulge.

Are they saying anything with the keep ph at 7-7.2 range to prevent stain and osmosis?

Funny thing, on the same facebook groups, people are complaining that after 1-2 days of rain, the pool turn green. Some say it's normal and I was "eu, no, it never was for any type of pool, you clearly have alga in your pool and your water / filtering system isn't clean".

 

[Texas Splash]

You have to be careful about internet "claims" to solve pool problems. Many are unfounded. Trying to force a pool's pH to remain around 7.0-7.2 is not only extremely difficult to do on a long-term basis, but could potentially cause problems for equipment later. The TFP recommended pH level is like most in the industry which is anywhere between 7.2 - 7.8. Because of the nature of pool water, the pH tends to float upwards and stabilize around 7.8 for most. With fiberglass pools, the gelcoat can change. It doesn't happen to all shells, but it does happen to a lot of them, and it happened to mine. Even with the best of water chemistry, it happens. It's the nature of the gelcoat and there's really not much you can do to prevent it. Even owners who elected to have a new gelcoat application applied found it changing again in a couple seasons.

 

[nodiaque]

Yeah, I know I must be careful about all those claims hence why I took the question here. There was already so much questionnable information like "it's normal for the pool to turn green after a rain".

 

[Texas Splash]

If you ever have a question about the water, don't hesitate to come back and ask.

 

[Darin]

"it's normal for the pool to turn green after a rain".

Only true on St. Patrick's Day in Chicago

 

[Newdude]

There was already so much questionnable information like "it's normal for the pool to turn green after a rain".

It was normal for many of my friends with pools. We'd sit around at the weekend BBQ and this one who went green would be hashing out a plan with that one who went cloudy.

I fought getting a pool for a long time because I wanted no part of the headache. If my friends who had pools for years and maybe decades couldn't master it, who was I to do better ?

It turns out, not a one of them had a clue and their out of control pools proved it everytime it rained.

 

[nodiaque]

I did had a good laugh when I read that. I had a pool since I was 14 years old. Never saw the pool green except on opening day. My dad was just following pool guy advice but never had problem having it turn green because of rain.

My last pool, an above ground one, had a problem with algea. Was the first time I was actually taking care of the pool outside of just vacuuming. I got it green and vacuum without going to waste. My sand got full of algea (and was probably already bad). I fought 4 years with it. Patch holes, change liner, was getting green after about a week each time. I sold it and bought the fiberglass one and learned how to take care of it. Never saw it green except the first year I opened it myself. And this year, I opened it and it was already cleared. And with tfp now, cannot have a better pool water

 

[Lake Placid]

Regarding the osmotic blistering unfortunately you won’t be able to do anything if it’s truly osmotic blistering. This is caused by manufacturers using polyester resins on the outside (ground facing) layer as opposed to vinyl ester resins. Fibro pools claim to use vinylester. I can’t find any details on their site regarding makeup so in theory 1% vinyl ester resin over polyester resin could be called vinylester. If a vinyl ester resin layer is applied thick enough (100 - 120 mils) on the water bearing side you shouldn’t have any issues because it will provide protection for the polyester resins, but if it’s too thin via a manufacturing defect, cheap build quality etc. blisters will occur. There’s a lot more to osmotic blistering if you want to read up - google “grp blistering” or osmotic blistering in pools.