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Old 06-10-2009, 03:06 AM
GpsFrontier GpsFrontier is offline
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Join Date: Mar 2009
Location: Lake Havasu AZ.
Posts: 1,855
Default Cleaning grow rocks

I have tried to clean my grow rocks using a diluted bleach water solution and brushed them around with a big brush. There is still a white lime looking residue on some of them that doesn't seem to come off. Just wondering if anyone knows a good way to clean this off using stuff found around the house?

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