i asked them why and this is tracys responce

Hey tracy,, why is their mold in my GIG


Mold will not grow in the Grow It Green. What you are seeing is cellulose falling out of the mix and settling, because of the humic acid in it. This plant cellulose comes in trace amounts from when we extract minerals from the comfrey, there is no way to completely eliminate it without using a harsh chemical. This cellulose is very soft and will not harm plants or damage pumps. You can simply strain it out with a paper coffee filter to remove it. It will not hurt a thing.

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LEGAL MONTANA MEDICAL PATIENT (ORGANIC) http://www.rollitup.org/grow-journals/195038-organic-montana-medical-grow.html#post2510183