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Re: Is Bio Terra plus soil or soiless???
The name suggests earth 'terra' meaning 'earth'. The contents, peat, bark, coco, suggest some qualities of soil, but not all of them.
Your question was 'what PH should I use for my medium'?
The answer in the grow guide you mentioned is
"The best range for nutrients to be absorbed is between a pH of 5 and 7 and a (TDS) range of 800 to 3000 PPM." (*****)
So, just keep her at 5-7 and she'll be apples.
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