I'm rounding up supplies for my next grow in coco. Coming from an organics background, I've never bought ph up/down, but when I got home from the hydro store and read the bottles, first thing I noticed were the 'poison' warnings on them and all the other health hazards listed! Is this standard and is it safe to be using on our plants that we ingest??
'Grow More' ph up/down?
- Thread starter Kushfan
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