New pool owner here so bear with me... I recently renovated a 12,000 gallon vinyl-liner pool with an IC15 SWG system. I have since had difficulty maintaining FC levels above 1.0. Prior to ordering a Taylors kit I was relying on the pool company's tests and they said all other indicators looked OK except that there was a presence of Phosphates causing the low FC levels. This was treated with 5 lbs of Cal Hypo and 32 oz of Lo-Phos Pro. FC levels spiked above 10.0 ppm but within 48 hours levels returned to 0-0.5 ppm. During that time the SWG system has run 24/7 @ 100% output. After a follow up tests seven days later the pool company recommended an additional 32 oz. of Lo-Phos Pro due to a still existing 100 ppm presence of phosphates. It has now been 48 hours since follow up treatment of Lo Phos.
My Taylor's kit arrived today and my results are as follows:
CH = 80
CYA = <30
Any ideas what may be causing this? Pool is in direct sun for the better part of the day. Do I need to let the Lo Phos run its course and continue boosting the SWG until FC levels increase or should I try raising my CYA levels?
Any help is greatly appreciated.