Good question Danny - would hate to loose an RO Membrane to chlorine destruction.
Points to consider:
- Chlorine dissipates naturally over time - slower in a closed tank, though. So don't flush your water maker for a month or so after tank cleaning (just use it frequently).
- Vitamin C or ascorbic acid neutralizes chlorine totally. Add a bunch. 2 pounds for 20 bucks. (Maybe combine Orange Juice with the Vodka?)
- Don't guess - get a swimming pool test kit and see how much chlorine you've got before, during and after cleaning the tank.
- Replace your charcoal filter early and often but especially before your first back-flush after cleaning the tank.
Cheers, Craig Briggs, SN68 Sangaris