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Natural chemical cleaner for algae that can't be reached by hand

 
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I built a solar powered water distribution center for my garden this year, that pumps irrigation water to a drip system. My staging tank, a 275g water tote, has some algae on the inside walls. As I begin to winterize, I'd like to clean the algae. I can't reach these areas by hand.

I can pressure wash with water. But that will still leave some behind. Is there a natural chemical based approach I can use?

In my days of home brewing beer, I remember using a cleaner for kegs that was pretty miraculous.

Thanks!
 
pollinator
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Location: Massachusetts, Zone:6/7, AHS:4, Rainfall:48in even Soil:SandyLoam pH6 Flat
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I think that the algae will die if you let them dry out.
But if you do the exact same thing next year like you did this year, they will grow back.
Painting the tote black seems to help (on all 6 sides), the less sun the better.

Also you can use the same "food grade chemical" that you use for your beer to kill the algae.
 
pollinator
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Or you could put in a biological control like aquatic snails.

My much better half makes large glass orbs for art installations involving avocado plants growing in water. It is incredible how effective those little things are.

-CK
 
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