I have two questions about ro and nsw.I'm just thinking about all my options before I start Reefing I would not like to make costly mistakes when my system is eventually up and running-whenever that is. 1) How long can one store RO in a sealed container? Will it go bad or will there be any ill effects if its stored for lets say for a month and you use it for top ups and water changes? 2)Would it be safe to collect water from beaches round me like Gordons Bay or Rooi Els or Bettys Bay? Has anyone collected from there before?