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I use a qt for 50 gal of mix, we go from 33-40% SH, M-LO-Snot all work. From what I can see it really looks like the SH is not hot or fresh. We see a difference in SH in 30 days. I ask how hot we are before every delivery. I buy 250g lat a time, so getting stuck with 400.00 of salt water sucks. We pre-treat the bombs and growth with 50/50. I will hit it again prior to leaving, happens almost never. It takes a few good rains to rinse the haze away. Green shingles give us trouble? They need several rinses. I rinsed (partial) a garage today, just to get rid of salt marks and haze because it was a 1M log cabin and the garage was front and center, what I call the house's "money shot". HO said he would pay me in a week when I came back to check on it. Not much H20 in forecast. Haze is normal with no rinse. I have a local guy that runs his 50/50 all the time, does not bag and is team of one, he's rinses every job for instant pay.

Just because a vendor sells a lot does not mean your stuff is fresh. I have dumped 200g after having to do too many call backs. Don't trust a SH vendor till it delivers, many don't understand our business of cleaning and spore eradication. Pools don't care if the stuff is 90 days old, it kills urine and most bacteria in water instantly, even when weak says my vendor, pools sit on SH all winter and use it in spring.

Hit it with 50/50 and rinse is my two cents.

Resuming last nights posts:

I have a 1/2" air diaphfram pump and I shoot from the gutter line- top down left to right. I'm too old to get up on a roof

Since people are questioning the quality of my SH I just ordered a test kit from Taylor. Hopefully I'll have it by the first of the week.

Tomorrow morning on the way to another job I going to go past the church and rinse a section of the roof.  I'll check it about 4 hours later on the return trip and let you know the outcome.

Regarding rinsing.  Do you wait some period of time before rinsing and what do you do about the runoff.  Is it still hot?

MJ wrote:

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I use a qt for 50 gal of mix, we go from 33-40% SH, M-LO-Snot all work. From what I can see it really looks like the SH is not hot or fresh. We see a difference in SH in 30 days. I ask how hot we are before every delivery. I buy 250g lat a time, so getting stuck with 400.00 of salt water sucks. We pre-treat the bombs and growth with 50/50. I will hit it again prior to leaving, happens almost never. It takes a few good rains to rinse the haze away. Green shingles give us trouble? They need several rinses. I rinsed (partial) a garage today, just to get rid of salt marks and haze because it was a 1M log cabin and the garage was front and center, what I call the house's "money shot". HO said he would pay me in a week when I came back to check on it. Not much H20 in forecast. Haze is normal with no rinse. I have a local guy that runs his 50/50 all the time, does not bag and is team of one, he's rinses every job for instant pay.

Just because a vendor sells a lot does not mean your stuff is fresh. I have dumped 200g after having to do too many call backs. Don't trust a SH vendor till it delivers, many don't understand our business of cleaning and spore eradication. Pools don't care if the stuff is 90 days old, it kills urine and most bacteria in water instantly, even when weak says my vendor, pools sit on SH all winter and use it in spring.

Hit it with 50/50 and rinse is my two cents.

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 You would really let a customer dictate when you get paid?? Looks like a red flag to me.

The before & after pictures should be proof enough.

If they don't trust you know what you are doing then I wouldn't do the job. Just My Humble Opinion.

I haven't seen shingles faded unevenly by the sun... Yet.
If your worried just bump up your mix a bit a spray away!

I wouldn't go higher than that. If it is algae and your SH is good it should be no problem.