Salt water pool, gunnite finish. I had a major calicum scaling problem when the pool was opened this spring (2nd year of use). I did two no-drain acid washes which pretty much took care of the problems. I've been testing my water and I know I have a couple problems that I'm dealing with and one problem (calcium hardness) that I'm not dealing with (don't want to replace 15,000 gallons of water).
My question is, what are my problems/risks/issues with keeping the calcium hardness higher than normal until evaporation/spashing causes enough water loss and replacement to bring things back to normal?
My latest pool store test results are below, but I'm a little suspect of some of the numbers (I got a higher CYA number (and so did they) a couple weeks ago before I added more CYA!) (Original CYA number was 55, but after adding 10 lbs of CYA it's down to 45!?!?!?) Doesn't make sense. Also the CH number was around 640 two weeks ago and now it's 375. Doesn't make sense!
Anyhow, here are todays numbers from the pool store (I tested too, but forgot my numbers at home
T/A 145 (it was about 185, but I've been bringing it down)
CH 375 (two weeks ago it was 640)
CYA 40 (two weeks ago it was 55. I've since added 10 lbs CYA)
Total Disolved Solids 4500
The remedy for the high total hardness (CH) was to add 3 quarts of Scale Inhibitor accounding to the print out from the pool store.
1) Should I bother with the Scale Inhibitor or is that snake oil?
2) Can I just wait out the high hardess levels without doing major damage to people/equipment/pool?
Actually, a third question: Should I be concernend about my high total disolved solids number? I don't recall people testing for that or talking about it.