What is the best and cheapeast calcium chloride (dihydrate) to buy to increase CH?

[bfang711]

hi,

My CH is only 40, I need to increase it. Several questions.

1. My pool is a Vinyl pool, does it need CH to be above 200? If not, will anything bad happen?
2. Where can I buy the cheapest material? (There was an old 2012 post for a link to homedepot, but it is not valid any more.)
3. What's the best way to apply the calcium chloride in the pool? In other words, through skimmer, pre-dissolve, or spread in the pool directly.

if there is any link you can refer me to, please do.

thank you very much.

 

[AimeeH]

With a vinyl lined pool there isn't need to worry about calcium unless it is high enough to cause scaling. I think I've tested my calcium twice in 5 years. First time was under 100 like you. I ignored it.

Here is a helpful link. Pool School - ABCs of Pool Water Chemistry