The Planted Tank Forum - View Single Post - Cat litter substrate
View Single Post
post #13 of (permalink) Old 11-15-2012, 06:20 PM
Planted Tank Guru
lochaber's Avatar
Join Date: Jan 2012
Location: Oakland, CA
Posts: 2,318
Most of these calcined clay type substrates (turface, safetsorb, oildry, kitty litter, flourite, etc.) just provide an inert (won't dissolve/breakdown/affect H2O chemistry, etc.) substrate that has a high Cation Exchange Capacity (CEC).
This means that cations will temporarily bind to the substrate, and from there the plants can make use of them.

So the substrate is inert, and doesn't contain nutrients itself, but helps convey nutrients in the watercolumn (or added to the substrate) to the plant via the roots.
lochaber is offline  
For the best viewing experience please update your browser to Google Chrome