Being an avid home brewer and wine maker I'm used to adding metabisulphate to things to sterilize them, prevent fungal growth, etc. My question is: can I add some metabisulphite to my rainwater butts to stop algae and will it harm the plants....i'm thinking very small amounts. Like most grow-your-owners I'm reluctant to buy anything if I can improvise with what I've got....or is that because I'm a Yorkshireman
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Originally posted by rustylady View PostThe green water probably won't do any harm if you use it for general garden watering. Just don't use it on seedlings in the greenhouse
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