Many service technicians and pool service companies will rely on a “generic” standard for water chemistry levels. This was adequate when pools were all the same but fiberglass pools are not like the “standard” gunite pool or even vinyl liner pools.
For this reason, you must look at water chemistry levels that are more appropriate for fiberglass swimming pools. Our recommendation would be as follows:
- pH = 7.2 – 7.4
- Chlorine = 1.0 – 3.0 ppm
- Total Alkalinity = 80 – 120 ppm
- Calcium Hardness = 80 – 120
- Cyanuric Acid: 25 – 50 ppm
- Total Dissolved Solids = 500 – 5000 ppm