P phanmc AC Members Jun 24, 2004 2,068 0 0 Visit site Sep 13, 2007 #11 Carbon will remove tannin so it should be removed if you're simulating blackwater. Carbon is not effective in removing minerals so you can use carbon filters while fertilizing and not lose any significant amount.
Carbon will remove tannin so it should be removed if you're simulating blackwater. Carbon is not effective in removing minerals so you can use carbon filters while fertilizing and not lose any significant amount.
