First post - hi everyone!
Started maintaining my pool last fall when I bought the house. Previous owner had been using a puck dispenser with trichlor and CYA level was 220. I've managed to work the CYA level down to 50 with drain/fills and the help of a tropical storm. I keep excellent records of my pool chemicals using a spreadsheet. Here is my issue:
In May, June and July, when my CYA was 70-80 the pool was consuming approximately 1.8 - 2.2 ppm of chlorine per day at a FC level of about 8ppm. pH 7.5, TA 70, CH 250 - 300, CC 0.5.
In the last five days, after getting my CYA down to 50 it is consuming only 0.73ppm per day at a FC level of about 6ppm. pH 7.4, TA 70, CH 225, CC 0.5.
This is with a similar weather pattern, same water temp. the water is crystal clear. (I know my hardness is a little low - working on that, but it's consistent between the two periods in question.)
I've been using the same chlorine - 2.5 gallon jugs from Leslies.
My question is this, according to what I read on here, FC consumption should be lower at higher CYA levels - why am I seeing the opposite? What am I missing?
Started maintaining my pool last fall when I bought the house. Previous owner had been using a puck dispenser with trichlor and CYA level was 220. I've managed to work the CYA level down to 50 with drain/fills and the help of a tropical storm. I keep excellent records of my pool chemicals using a spreadsheet. Here is my issue:
In May, June and July, when my CYA was 70-80 the pool was consuming approximately 1.8 - 2.2 ppm of chlorine per day at a FC level of about 8ppm. pH 7.5, TA 70, CH 250 - 300, CC 0.5.
In the last five days, after getting my CYA down to 50 it is consuming only 0.73ppm per day at a FC level of about 6ppm. pH 7.4, TA 70, CH 225, CC 0.5.
This is with a similar weather pattern, same water temp. the water is crystal clear. (I know my hardness is a little low - working on that, but it's consistent between the two periods in question.)
I've been using the same chlorine - 2.5 gallon jugs from Leslies.
My question is this, according to what I read on here, FC consumption should be lower at higher CYA levels - why am I seeing the opposite? What am I missing?
