What to do with wet Cal-Hypo

weatherly099

New member
Jun 1, 2020
3
Celina, TX
Hi all,

First, I want to say thank you to this forum as it’s been my go-to for the past 4 years from designing to now maintenance of our pool. You guys are awesome, and I really appreciate you!

Our pool builder gave us about 5-10lb of 65% Cal-Hypo which we have used occasionally over the past 4 years (less than 1lb at a time) when our salt cell hasn’t run long enough. I have had it stored in a plastic container with a breathable lid (one I got from the packaging dept when I worked for an industrial chemical company), and it’s been dry up until we pulled it out last week. It’s stored on a shelf in our garage which is not damp but subject to the North Texas heat/humidity.

When we pulled it out last week to use it, the life was open and entire container of cal-hypo is wet like a paste. It was not around any other chemicals and can only guess it’s wet from the humidity. I’m assuming this is no longer safe to store or keep. Is it salvageable? If not, how should we safely dispose of it?
 
Hazardous waste disposal through your local town/city public service dept. That’s how we do it in these parts. Pool chems are considered hazardous waste and if you illegally dispose of them you land yourself in a lot of hot water with big fines from the Dept of Environmental Protection. Just calm your city office up or check their website to se if they have any details.
 
I'm just asking because I'm curious... wouldn't it be OK to add it to the pool? Depending on size it wouldn't add to much calcium. Maybe even in a few batches?
 
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I'm just asking because I'm curious... wouldn't it be OK to add it to the pool? Depending on size it wouldn't add to much calcium. Maybe even in a few batches?

Sure. As long as your CH can handle the increase. It may be less effective at increasing FC because when it gets wet it emits chlorine fumes. But you could dump it in the pool. Do it carefully though and lower pH beforehand because it can strongly raise pH and cause temporary cloudiness from calcium precipitation
 
Sure. As long as your CH can handle the increase. It may be less effective at increasing FC because when it gets wet it emits chlorine fumes. But you could dump it in the pool. Do it carefully though and lower pH beforehand because it can strongly raise pH and cause temporary cloudiness from calcium precipitation
I really like this idea. Do you have suggestions on how to do it carefully and where pH should be? Thinking we could put it in a 5 gal bucket and set it in the pool to dissolve.
 
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