Ideally you might want to treat it now (chlorine, 30 seconds, dairy sanitizer etc) then water blast it when you go back in a months time. Give the moss and lichen some time to break down and release.
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Ideally you might want to treat it now (chlorine, 30 seconds, dairy sanitizer etc) then water blast it when you go back in a months time. Give the moss and lichen some time to break down and release.
Sent from my iPhone using Tapatalk
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