Calcium climbs from 250 to 500 over 3 months, making it difficult to maintain a safe SI. TA @ 75 to 80 adj. to 55 to 60 using wheel, w/ CYA at 65. PH requires 8 to 12 oz acid every 3 days or so to bring down to 7.8 Pool is very warm 90+ now on So Padre Is. TX. I can't find any reviews on MP3000 but am wary. Does anyone have any experience?