I think I know the answer but will feel better bouncing it off you guys
I added 50 ppm borates last year. After closing and opening, I tested with strips and was down to what I'd call 25ppm, so added enough to get me back up to 50.
I'm thinking that next year when I add, I'll target 75 instead, as if I'm losing 25 over a season, this will leave me with closer to 50 at close/opening, when I could use the max algae prevention properties.
Any problems with this?