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what kind of rocks or clay balls


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Old 02-12-2009, 04:50 AM
porous porous is offline
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Default what kind of rocks or clay balls

what kind of rocks or clay balls do i put in my hydo-system

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Old 02-12-2009, 04:51 AM
Ron Ron is offline
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grow rocks - a porous clay kiln fired material that can be used over and over again after cleaning with a 10 percent bleach solution.

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