The pool store sells 5 star pool antifreeze for $5.00 a gal, the farm supply store sells RV antiffreeze for $3.oo a gal. Both are good to -50f. Will the RV antifreeze mess with my water balance next spring when I open? Should I not use the RV antifreeze?
I've seen two "flavours" of antifreeze up here in Canada anyways, one is alcohol-based (I just can't think of the exact name right now), the other one contains calcium chloride. The LPS sells the calcium chloride one and has a sample of the other one on the counter. The customer thinks he's getting more bang for his buck because the calcium-based one is noticibly heavier.
I've used the 'regular' alcohol-flavored version*
(it does say RV on it) and had no problems with our winter weather sometimes approching -22F. I'm not sure of the effect of adding a calcium based antifreeze on the water balance.
* In the pool