Calcium chloride dihydrate

[Ron99]

But the dehydrate is just water. So if you are thinking fewer contaminants in your tank that won't be the case. If you're thinking % calcium vs. weight for shipping then it might make a bit of difference.

[Stinktooth]

I'm using bulk additives with part c for the balling system. I'm trying to source out dihydrate so that it's more in balance. Taking off 20% is just a average percent. It will never be perfect but I can get it a lot closer with dihydrate.