Calcium hardness and fiberglass pool

[aguaguy]

Should I be concerned with a CH of 100 in a fiberglass pool?

FC 3
Ph 7.4
TA 120
CYA 40
TDS 500
water is perfectly clear although I have some brown stains only on rough surface of steps. I use metal free on a weekly basis along with pool perfect

[mas985]

If you do not have a SWG or heater, it should not be a problem. If you do, then go by the manufactures recommendations to maintain warranties.

[aguaguy]

Thank you for the help