30,000 gallon inground pool with DE filter. Outside of Dallas, TX. New pebble Tec was installed in May 2020. Pool company went out of business in Aug '21 and we had to switch maintenance companies. I haven't been thrilled with the new company, but haven't had a major reason to switch. This week (out of nowhere), they said we had high CYA and need to drain pool soon. They said CYA is 140, but didn't provide any other numbers.
I took sample to Leslies today and got the following results:
FC 6.54
Total Chlorine 6.67
pH 7.5,
TA 28 *adjusted due to the effect of CYA on tested Total Alkalinity
CH 402
CYA 179
Iron 0
Copper 0.4
Phosphates 41
TDS 1300
From what I've read on this forum, it seems like draining is the only option now. My question is, did the pool company mess up? Or is high CYA something that just happens? I know it can be a product of chlorine tabs (they just added a 2nd floater earlier this month), but they're saying it's the "industry accepted practice to drain and refill pools with fresh water every 2 to 5 years", which seems excessive to me.
I took sample to Leslies today and got the following results:
FC 6.54
Total Chlorine 6.67
pH 7.5,
TA 28 *adjusted due to the effect of CYA on tested Total Alkalinity
CH 402
CYA 179
Iron 0
Copper 0.4
Phosphates 41
TDS 1300
From what I've read on this forum, it seems like draining is the only option now. My question is, did the pool company mess up? Or is high CYA something that just happens? I know it can be a product of chlorine tabs (they just added a 2nd floater earlier this month), but they're saying it's the "industry accepted practice to drain and refill pools with fresh water every 2 to 5 years", which seems excessive to me.