Salt Water Damage To Pool
I have a 15x30 aluminium pool. Part of the pool has a deck around it. At the beginning of this pool season I noticed holes in the pool wall at the bottom, underneath the deck. I have a salt water system.
Could it be that the salt has damaged the wall or did I just get a "dodgy" pool wall. Has anyone experienced this?
Thanks for the question Diane
Yes, it could be possible that this is salt damage. Some of the plumbing at the YMCA pool where I was the pool operator was similar to this. It had a crusty layer of salt that could be chipped away. You may have a pin-hole in the vinyl that is causing water to slowly leak and build up a layer of crusty salt.
If you have a high calcium hardness level and are unable to lower it through water dilution, then you can lower the total alkalinity and pH in order to prevent and/or slow scaling. With salt pools the alkalinity can be down to 60 - 70 ppm and the pH can be lowered using muriatic acid to 7.2 - 7.4. In some extreme cases, you can use a metal sequestrant designed to reduce calcium levels and inhibit scaling.
Was is the salinity of the water? Is it in range, or too high? Many chlorine generators have a range of 2500 - 4200 ppm.
It also could be calcium build-up. What is the hardness reading? Do you have hard fill water, above 250 - 300 ppm? Do you use calcium chloride if you have soft water? Do you use granular chlorine (calcium hypochlorite) to shock the pool? All of these will increase the hardness of the water and can cause calcium build-up.
There are two benefits of having a salt water pool. One is the salt makes the water feels better. It's a little softer than a regular chlorine pool. 2nd is you don't need to add chlorine on a weekly basis. The salt chlorine generator takes care of this.
Hope this helps and have a great Summer.