Look into Chlorine Dioxide, as an alternative to other water de-bugging agents...
Been posted abt here repeatedly...
Arguably a better approach. Look on eBay for a lot of info and prices and fast availability.
It's made by reacting sodium chlorite with a weak acid, like citric acid.
Sodium chlorite is available in bags of a pound or so and also kits.
Search eBay for Sodium chlorite.
Can't link to eBay for some reason.