My plaster pool was completely resurfaced and refilled 3 summers ago (2011). In that time I switched to the BBB method and while this worked and looked good for 2 summers, it's falling apart now.
My CH level has consistently gone up and nothing brings it down... not even overflows of rain water. And I have been told that with my numbers, I will not be able to prevent damage to the surface or the equipment OR have the chemicals I'm adding make any difference. I have been getting regular algae blooms this summer and cannot make them go away. My pool is also not holding an FC level, no mater how much bleach I add or how many times I SLAM it. The pool store says the phosphates are responsible for the algae.
Current numbers are as follows:
FC = 0
CC = 0
PH = 7.4
TA = 110
CH = 500-610
Phosphates = 2500
CYA = 50-60
Borates = 60
I have a TAS-DPD kit and regularly test my chemicals, though I also take my water to the store for testing (since I can't test phosphates at home).
Do I really have to drain and refill again after only 3 summers?