"Sand paper" on the sides of the liner

[birdman858]

Hi folks. Each year, I leave my 33' round above ground uncovered. Spring opening is easy as I have no trees. This year, I was surprised to learn I had a "sand paper"-like deposit in the liner starting just below water line. I never drain down below the jets in the fall closing. I remove the pump and all hoses and just let snow and rain drain out the jet. I suspect the sandpaper is being caused by calcium deposits...maybe the pH got really low this year. Could you guys feed me some ideas for removing the deposits? I appreciate your input.

[wboss71]

Hello. Liner pools can be treated but they need to be dealt with carefully or you can ruin the liner. To know what type of scale you have go to googol. It can look different depending on the age and water. You could try lowering the pH to around 7.2 for a while to help the water soften the calcium over time. For a more aggressive treatment you can get a scale remover in dry power form and hold it over the affected area in a stocking or filter sock for short periods of time. Please be very careful as this material could damage your pool if not handled properly of left on the walls too long.