65% Cal Hypo

[chem geek]

Sherra,

Cal-Hypo that is 65% pure and (it turns out) produces about 65% available chlorine has 1 pound equivalent to 1.22 gallons of 6.15% bleach (typical Clorox regular bleach). It would take about 1.06 gallons of 7% Ultra bleach and about 1.42 gallons of 5.25% bleach.

1 gallon of 5.25% bleach is equivalent to 0.69 pounds of 65% Cal-Hypo while 1 gallon of 6.15% bleach is equivalent to 0.82 pounds of 65% Cal-Hypo.

Hope that helps.

Richard

[Sherra]

Yes, that helps a lot! Thanks! I think getting the 65% Cal Hypo at $1.30/pound (bulk bucket) is worth it then!

[chem geek]

Yes, it would be economical at that price. Just keep an eye on your calcium levels if you end up using this as your only source of chlorine. 1 pound of 65% Cal-Hypo increases the Calcium Hardness (CH) by 5.5 ppm in a 10,000 gallon pool (the ppm rise would be less in a larger pool, etc.) and depending on the specific brand you use it could increase calcium even more (it depends on what the 35% inert ingredients are -- sometimes some of them are calcium salts such as calcium chloride and calcium hydroxide).

Richard

[Sherra]

Thanks. I knew I'd have to keep an eye on the calcium. I'm fine for now - it's between 40 & 50 right now - and I've got a 27,500 gallon pool, so it should take me a while to get a lot built up. Plus I do still plan on using good old fashioned Wally World 6% bleach also.