Palmfarmer Posted January 23 Report Share Posted January 23 (edited) Hey, I like to get some greensand in my potting mixes for a really slow Realese of pottasium. I see there is some bags ment for fertilizing that costs over 100 usd. However there is another seller that sells it by the lbs really cheap, but it says it is for water filtration. Is there really any difference in these? Edited January 23 by Palmfarmer Link to comment Share on other sites More sharing options...
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