Yep thats the same biothrive im using.Im probably going to add diamaceous earth to my next batch of soil, although I'm not sure how much yet. It's a source of silica and would hopefully help out in a few different areas. I bought this a while ago in the event that I'd need it, but haven't used any yet.
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I'm interested in how it affects the water retention and aeration also.
Is this the biothrive you're using or did I look at the wrong thing?
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