dechlorination

Hello, When we got our spa we bought some sodium thiosulfate that came in handy whenever we accidentally added too much chlorine. The cover on the spa (275 gal.) is on except when in use in evenings and when adding chemicals and sits in the shade all the time. It definitely did the trick and of...

In preparation for draining my pool (new liner on the way) I was looking at threads for dechlorination. I found this thread: Calculator or instructions for sodium thiosulfate? and one response referenced another Best Way to reduce Chlorine level. But the latter link appears to be broken? Is...