1, i just got my k-2106 test kit and i had a k-1004 test kit. both have the reading for bromine. now here is my problem. k-1004 with the color match gives me a reading of 4ppm bromine looking at the north sky standing in the shade. the k-2106 with the drop test give me 8.5 ppm bromine with the 25ml level and 17 drops.
is this normal? i take it i should beleve the drop test.
2, my spa has a small waterfall. the spa book say not to have the watefall running while the cover is on. the waterfall is below the top of the spa so the water wouldn't hit the cover. my guess is that the waterfall causes outgassing and that's why they don't want it on? the spa has a ozonator and wouldn't that make more outgassing then the waterfall? i'm using bromine tabs in a floater so i'm fighting ph drop. my thinking was the waterfall would help slow the ph drop. anyone run there waterfall with the cover on? anyone know why they don't want you to run it with the cover on?
3, CH level. my CH is up to 250+ and it hasn't been a month since my last water change. is there a point where ch is too high and i need to do a water change? i can drain some water and add water from my water softener. then i'm thinking of filling my tub next time with 50% water from my water softener.
thanks for your help.