Paul, I will let Doug answer that one. 

On the job I do not havetime to calculate %.  It is a matter of what mimium mixture of SH that you can use to clean a roof.  The weaker the mix the less cost involved in material to clean the roof, less run off that you have to neutralize so it will not harm vegaion, but the more time that it takes.  When you do not have a lot of business you go this route.

When you are busy you increase the percentage of SH so that it will clean faster and you can get on to clean the next roof faster. 

Your math seems to be correct to me Paul. Although math is not my strong suit. I always try to start with the lowest amount of bleach that I can. For me this is whether it is the busy time or the slow time. IMO I am more profitable if I can use less materials, minimize plant damage, and put out a quality roof cleaning job on every roof.

So, I guess I sort of disagree with Marcus, well not really disagree, cause there is nothing wrong with his method, it's just personally I never strengthen my mix for the sake of working faster to get to the next job. Everybody will do things differently, I just choose to mix and do it the way I do.

Hope that helps.

That's a great idea, AC.

What got me thinking about this was watching a guy have to dispose of 20 or so gallons of mix the other day simply because it had gone cold sitting in the tank. To me, that's not an acceptable expense. If I think I need an extra X amount of mix to complete a job, I want everybody on-site to know how much water, SH, and Green Wash to mix with whats already in the tank to complete the job. A laminated card on the soft wash rig or maybe taped to the inside of the back window of truck is an excellent idea!

We just make one set mix, say 4%.

That is it, never change it, adjust it or play with it.

I fill my tank to mix capacity everytime. If we have 75 gallons left over, I make note of it and then make a full tank back to 4%.

Never changes, systemized wins everytime IMO.

Same results/speed.... And I spend more money on bleach a year than most make in a salary at a 9 to 5'r...

I understand the thought of doing better business, but I believe that is made up with improving sales skills obtaining more money for the same job. This year I averaged 150 for a standard pool screen room.  My goal next year is not to do one under 200...I'll use the same mix and get the same results with the same speed everytime and make more $$$$.

 

Sure in a 100 gallon tank of water every 100 ounces of powder CH bleach will make a 1% solution.

AC

Hi Dan,

I just recently joined the forum and was curious after reading your post. Is this the mix you primarily use for other cleaning projects as well?

What mix would you recommend using a 30 gallon tank?