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Google 'Nitrate, Ammonium and pH in hydroponics', scroll down to Science in Hydroponics.

Been using Grodan for years. I was just curious as to what others were doing. I'm basically doing the same sort of times/durations as you are with the 6's. I check the run off and adjust accordingly. I first started in soil, literally dirt from the garden and some Durban poison seeds that I got...

Any one running drip feeders on 1.2m Grodan slabs?. If so, how often do you have the pump come on, 2,3, 4 times a day? and what is the duration it's running for when it is on, 1,2,5,10 minutes?. Cheers.

I have never liked using ppm. Ppm meters read E.C. then convert it to ppm. According to what conversion your pen/meter uses will give you a different reading. A reading of 1400ppm is a difference of between 2.0ms and 2.8ms E.C. (ms being milli semens) So unless you know what conversion factor...

Did you post a video?. Would be interested to see it.

It could be the cube at the bottom, the 8x8, is drawing out the moisture from the 6x6. I notice this when I presoak cubes myself. Stand them on top of each other to drain and the ones at the top are bone dry and weightless in no time while the ones at the bottom, eventually, drain nicely. Get 2...

I use rockwool cubes sat on a N.F.T. table with a spreader mat feed by A+B Canna nutes. My Mrs uses 'TNC Mycorr max' Mycorrhizal inoculant in the garden on her veg and it seems to work well when grown side by side with plants that haven't had it. I was looking at the Great White as it says you...

Hi, has any one here ever done a side by side comparison grow with Great White Mycorrhizae?. Especially interested in grows done with N.F.T. . Thanks.