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Thanks for your prompt reply and I found your comments about overfeeding could indeed be the cause off the low pH run-off. I also take your point about the bad idea of trying to compensate with a high pH watering. When I tried this ill thought out method during my first coco grow it had very...

Cheers, that sounds like good advice. I was also pleased to hear that I don't need to water to run-off all the time. In answer to your question - yes I did flush thru the pots (15 litre) after veging but as I was concerned with the low pH I just used plain tap water (pH 7.5) instead of the usual...

Thanks for your good advice concerning my coco run-off problem. I've usually grown using NFT and as I'm new to coco I was unaware of some of the finer points concerning it's use.I'll now continue with confidence knowing that run-off pH is not as big a problem as I imagined. I'll address the...

I'm at a loss as to when I water with pH 5.8 water/nutrients I get a run-off of pH 4-4.3. How can I rectify the problem? Have only grown with coco once before and had the very same problem - the last time I tried to elevate the pH by watering with high pH water(pH 10 plus). This helped a little...