higgledy wrote:
I have read that deck cleaners are basically Oxalic acid. Being the
cheap-skate that I am does anyone know where can I buy Oxalic acid to
clean my deck?

My experience (and by the smell), is that they are nothing more than
sodium hyprchlorite -- simple BLEACH. Just use that. I've used it in
both as a spray with my power washer (best strategy), or with a bonnet
scubber (for carpets). The issue is killing the algae off. I have found
that once a year does the trick nicely. The power washer (Karcher) is
the best investment I've ever made. Useful for all sorts of heavy
cleaning jobs.