soz for the delayed reply mudvaynefan.... i've been off on my hols for a week and haven't been on-line.
Haven't used it yet (bought 20 litres...on standby) as i use rainwater... i live in ireland and it's normally plentiful but as the summer approcahes this can change rapidly...
I had a chronic grow on the go last summer and during dry spells used fresh mountain spring water from a stream with great results but i've moved house and now have no access to fresh spring water.
Just thought someone out there might've tried it as it's sooooo cheap