Still trying to move to the BBB method and figure all of this chem stuff out (I hated chemistry class....). I have a 431G hot tub with a SWG.
A couple of questions:
1 - the tub is fiberglass/acrylic and the mfg recommeds a CH of <50 for better operation of the SWG. Pool School recommends 250. As there is no plaster here, does it really matter what level I go with? I am thinking of staying with 50.
2- To get my CYA level up, I went out an bought some dichloro (sodium dichloro-s-triazinetricne dihydrate). Using the Pool Calc to get my CYA up to 70 I need to add 4oz of stabalizer. Is stabalizer just a different name for dichloro or am I completely off base here?
3 - If I am okay on #2 above, it only takes about 0.5oz of dichloro to raise my FC from 0 - 5. To shock to a FC level of 28 (per the chlorine/CYA chart for SWGs) would take about 2.9 oz. Is there any downside to shocking with the dichloro to quickly get the CYA level up instead of slowing adding it daily? I have turned the SWG generator off till I get my CYA level up.
4 - If I shock now (per#3) or at another time up to a FC of 24 how long do I need to wait till I can use the tub? The test kit only measures up to 5 so I am assuing it is impossible to tell the difference between 6 and 24 with the test kit. Do I need to wait till the test kit shows <5?
5 - My tub is usually covered unless I am in it. When I add chemicals to it should I leave it uncovered for a period of time or is this not necessary? Is it more imporatant for some chemicals like chlorine?
6 - Wanted to try adding borates to the tub and was going to go the easy route with Proteam Supreme Plus. To calc how much to add I thought that I read I could use the Pool Calculator set to boric acid. Is this correct? If it is correct and borates do not change over time, do I really need to buy another test for borates or would using the Pool Calculator and getting approximately 50 be good enough?
Thanks for any help. This site is great!