ALP Posted July 13, 2020 Report Share Posted July 13, 2020 I have an abundance of rainwater that I collect at my allotment from polytunnels so it doesn't touch, say roofing felt on sheds. The water gets stored in in clean plastic containers. All have lids to stop light getting in - for example, unused dustbins and blue barrels that have been pressure washed. The water is clear and has no green algae blooms. So........... how fresh does the rainwater need to be? is there a maximum period after which I shouldn't use the stored rainwater? Or am I just worrying for nothing? Thanks. Quote Link to comment Share on other sites More sharing options...
Lee Chamberlain Posted July 13, 2020 Report Share Posted July 13, 2020 I usually check mine with a tds meter.. Below 50ppm and you are ok.. but saying that i mostly have dionaea.. Not sure how pure the water should be for Sarrs and Cephs. 1 Quote Link to comment Share on other sites More sharing options...
ada Posted July 13, 2020 Report Share Posted July 13, 2020 So long as it's wet and doesn't, t stink it's fine 1 Quote Link to comment Share on other sites More sharing options...
ian Posted July 13, 2020 Report Share Posted July 13, 2020 1 hour ago, ada said: So long as it's wet and doesn't, t stink it's fine Bit like a pint of Bass birthday boy ! 1 Quote Link to comment Share on other sites More sharing options...
Dunc Posted July 18, 2020 Report Share Posted July 18, 2020 On 7/13/2020 at 2:51 PM, ada said: So long as it's wet and doesn't, t stink it's fine Not sure the plants mind at all but boy it makes for an unpleasant greenhouse 1 Quote Link to comment Share on other sites More sharing options...
Alexis Posted July 18, 2020 Report Share Posted July 18, 2020 On 7/13/2020 at 12:58 PM, Lee Chamberlain said: I usually check mine with a tds meter.. Below 50ppm and you are ok.. but saying that i mostly have dionaea.. Not sure how pure the water should be for Sarrs and Cephs. Your rainwater is collecting something if it's near 50! Should be about 12 Quote Link to comment Share on other sites More sharing options...
Lee Chamberlain Posted July 19, 2020 Report Share Posted July 19, 2020 My rainwater is 7ppm .. A safe value is below 50 ppm.. Depends on how you read my message :) 1 Quote Link to comment Share on other sites More sharing options...
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