Liquid Chlorine Sources?

[turbulentwaters]

I'm very happy with the "dichlor then bleach" method and have been using HTH 10% liquid chlorinator for a while. Problem is my local hardware store that carried it closed down and I can't find liquid chlorine anywhere. Pool stores don't have it. All the big box stores list it on their websites but it's not in stock.

Where is the best source of gallon jugs of ~10% liquid pool chlorine? I'll be using Chlorox 7.5% disinfecting bleach unless I can find some, but twice the price per Cl (not that it's super expensive in the first place, but still) and I'm not sure if it has additives.

Thanks!

[dashmer]

Sorry I cant answer your question, but I was worried about this situation and bought a bunch of liquid pool chlorine in the spring/summer, which is fine, except I didnt realize how quickly it decays in the bottle.  Even if you find it somewhere, be sure you account for the fact that it wont likely still be 10%.

[turbulentwaters]

Yeah, I cleaned out the old store's supplies when I found out they were closing. Almost out now. I once titrated a sample and it was more like 7.5% instead of 10%, but I think it had been sitting on the shelf for a while before I bought it.

[dashmer]

Here is a chart I did for myself based on a table I found on the decay of Cl (red row at the top, below).  My chart is based on 10% bleach kept at 75 degrees.  Not sure if the water gurus here would agree with it, but so far it has served me well.