Our 20 year old marcite pool was resurfaced in PebblesStone 5 years ago. We've just started getting a couple of calcium "bumps" and scaling. The outfit that did the pebblestone reports this is "normal" as these surfaces can cure for 5-7 years. They recommend acid washing with the following instructions. Please comment before we begin. Thanks.
In Pool Acid Wash
Adding Muriatic Acid to water lets the aggressive water work on surface
24/7.
Removing light and floor heads is recommended. Also by-pass older
heaters without Titanium coils.
To start, make sure chlorine level is down to 1.0 or less. Add muriatic
acid to the rate of 1 gallon per 3,000 gallons water to start. Then
maintaining alkalinity level at 20 ppm or lower. Using a sequestrian
product will help in lifting scale and metals from surface.
Leave pump running 24/7. Start brushing surface and cleaning filter
daily.
Make sure to keep alkalinity at 0-20 ppm or below.
This is a 7-14 day process as needed. When satisfied, rebalance
chemicals. You might need to dump a few feet of water and refill with
fresh water. Check hardness for this. Over 600 ppm, usually needs
dilution (fresh water).
Adding Muriatic Acid to water lets the aggressive water work on surface
24/7.
Removing light and floor heads is recommended. Also by-pass older
heaters without Titanium coils.
To start, make sure chlorine level is down to 1.0 or less. Add muriatic
acid to the rate of 1 gallon per 3,000 gallons water to start. Then
maintaining alkalinity level at 20 ppm or lower. Using a sequestrian
product will help in lifting scale and metals from surface.
Leave pump running 24/7. Start brushing surface and cleaning filter
daily.
Make sure to keep alkalinity at 0-20 ppm or below.
This is a 7-14 day process as needed. When satisfied, rebalance
chemicals. You might need to dump a few feet of water and refill with
fresh water. Check hardness for this. Over 600 ppm, usually needs
dilution (fresh water).