To all users whom use Turface MVP, Oil-Sorb, Hydroton or other calcined clay product in their soil mixes, I am asking why. I cannot find any information that supports its use - pros/cons, etc., and would appreciate feedback from those that may have references, personal experiences, or reasons for using.
I do understand that there may be CEC benefits, but less than adding organic matter and it all depends on the clay being fired.
My personal experience is that it is slow to dry, hold too much water and can foul with algae on the surface. The cost is prohibitive if growing anything more than a few plants and I currently do not see any benefits to using this product over scoria (lava rock), pumice or perlite. I see that there have been lots of discussions regarding additives and the dislike for perlite because it floats to the top, but limited commentary on this product.
Boo -
