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No, it's not poisonous to the plants. If you do some creative googling, such as "Sulphuric ph down hydroponics" or "Sulphur toxicity roots" or Sulphuric toxicity or whatever, You'll notice there isn't much said about sulphur toxicity. That's because it takes a lot of sulphur to hurt a plant...

If you note your 'sulphuric ph hydroponics' google, on the first page of hits, is a tutorial on how to dilute battery acid for home hydroponics. The author describes a mixture of 950 ml. of water, to 50 ml. of battery acid. The ratio of 950 to 50 isn't 9.5 to one. it's 19 to one. That gives...

Hey ya'll, you ain't gotta be payin these kind of prices for some timer. the most ubiquitous continuously variable timer out there is made by the Cana-Kit people. They sell electronic devices, some in kit form, some already slapped together. They're 18 bucks a piece, come with a relay already...

yes the ph is definately one of the only critical things about hydroponics. If you're water is soft, and you use pro nutes, that's not going to be a consideration, because pro nutes are buffered pretty well. People will tell you 'i never check mine,' etc etc. People will also tell you that Bill...

You can start seeds in polyfill... you know that stuff that is made of pure polyester thread, that they stuff pillows with? I have a faux unit i built that utilizes a spinning disk humidifier's mister.... It doesn't make a true aeroponic environment, because the aeroponic mist thats 50 and...