This is my first summer with the pool. See signature for configuration. I understand the recommendation and rationale explained on these boards for keeping CYA around 80 for SWCG pool but I am wondering if that is still the recommendation when I am not having problems with CYA at 40 and already reasonably low SWCG run time. My CYA has been 40 since opening this spring and only running the SWG (intellichlor IC40) at 20% to keep FC between 2.0 and 3.0 even during this peak 100 degree plus week. The pump run time is around 12 hours. Sparkling water all season, no issues other than the chronic PH rise that is apparently typical with first year plaster and SWCG. Water balance stats are as follows:
PH average 7.8 (acid controlled between 7.6 rising to 8.0 and treated again)
FC 1.8 this morning before pump was turned on. Generally, settles during day around 2.6 with pump running SWCG at 20%.
What are the expert thoughts on bringing up the CYA higher given the balance conditions I have now? It seems to me that I will just have to maintain higher FC levels to keep available sanitization the same, and if I do need to shock, spend more to achieve higher shock level. I ask, because CYA of 40 is counter to all the SWCG recommendations I have read, but it seems to be working for me without unecessary stress on the cell.