04-30-2013, 07:49 PM
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Originally Posted by redchigh
plain, cheap, unscented, clay Kitty litter provides next to nothing, but it has a high CEC. CEC is too hard former to explain in one post, but essentially its the ability to absorb excess nutrients and release them over time.
CEC is good, but a mixture of soil and crushed vermiculite is better. (4 parts sifted clay-rich soil, 1 part vermiculite, moistened, and kneaded together) has the same benefits. just cap with sand. there's another thread below this one that covers soil.
^^ sucks up the excess then slowly releases it, the plants take what they need witout having a huge risk of algae if im not mistaken.