BW,
I have no experience with a combo mix like this. You may want to check with them first, to verify it wicks as is needed for Self Watering Containers. The trick is to get capillary action (like in a sponge) but not too much such that the plant's roots are in totally saturated media. Also, aeration is extremely important hence, the use of Bark Fines and Perlite in my 3:2:1 Combo Mix recommendation.
Let us know what you find out.
Raybo