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Stay Clean wrote:

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Ok all, I talked to the pool man earlier today about the SH and im not sure if what he said is correct. He gets 500-800 gals of fresh SH once a week. He said the SH is 10.5% when its pumped into the yellow 2.5 gal jugs but after a week of sitting it weakens down to 6%. That would bring my final roof cleaning mix from 3.5% SH to 2% SH. I know the range we need to clean is between 3-4%. Does this sound right? Does it really weaken that much that fast? Again, im in south FL so its warm weather but I do keep the jugs in the shade if it matters.

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 In Florida, Pinch A Penny Stores have THE Best Chlorine. Try to only buy from a busy store with ONE Chlorine tank. 

Chlorine, like bread, is best when fresh. It sort of sounds like to me u are getting some weak chit ?

Do not be scared to try other chlorine suppliers. Your mix, with the TSP and Borax, should clean up a drug addict, LOL

I think u are getting weak (old) Chlorine!

I get my SH from a big name pool store (I wont say the name) that has ONE 1,000 gal tank out back and refills once a week. It is "winter" so pools are cold and the SH isnt selling like it does in the summer. Its possible that I got some week SH. I have a Pinch A Penny store about 5 miles away so I will go in there and see what %SH they have, how big there tank is, how often they refill, and what the price is there. Right now im getting it for $1.50/gal. I don't need to clean all the addicts, just roofs. We just got tons of rain the last 2 days so I all my roofs just got a good rinsing.