Since I live in Seattle, I’ve replaced at least 2 feet of my pool water with rain water this winter. So I started to wonder about my CH and TA since the rain shouldn’t have much or either. They were both scary low until I ran the pump for an hour, now they are just low enough that I want to address the issue before I open the pool.

I figure the smart thing to do is: take the cover off the deep end so I can brush baking soda and calcium chloride around (separately) with the pump running.

But that seems like a lot of bother. Can I mix the baking soda into the spa water and pump that into the pool. And then rinse and repeat with calcium chloride.

Is plan B dangerous to me or my pool and spa? I have poured the baking soda into the skimmer in the past, but I’d have to add several inches of water first and then pump it back out after then next big rain.

Why dont you just wait until you open the pool?

What are your numbers?

unless the numbers are extremely low i wouldnt even go through the hassel..

Mixing in the spa isnt a bad idea....

I don't remember the TA (notes are at home), I think the CH was 150 or 180. So I'm looking at about 1 lbs. of calcium chloride, I think the baking soda was also going to about 1 lbs.