I just got finished scrubbing and bleaching the floors in my GH too. Luckily
I didn't get much of any algae on the walls that couldn't be taken care of
with a sponge and the same soapy/bleach solution I used on the floor. I
think most folks with larger GHs use a power washer on their poly carb. (The
term may actually be pressure sprayer). I used a wire brush and elbow
grease - but then I was cleaning a brick floor, not plastic walls! LOL!
Smells much better in there now.

K Barrett

"Gideon Singer" wrote in message
news
I have a "small" 8ft square polycarb panel greenhouse that every year
needs to be cleaned of algae. I was wondering, as I get ready for
another round of scrubbing and rinsing, what other people do to keep
their greenhouse walls clean and free of algae?