Red CaribSea Eco-Complete substrate question

[Firestorm_1976]

Yesterday, I put together a new 29 gallon aquarium. The idea was to plant it in such a way that it would require minimal trimming due to most plants being non-stem plants (samolus parviflorus red, and a few types of crypts, so heavy root feeders). Only some stem plants toward the back, and some bacopa (which is a very easy straight-forward trimming) throughout. For the first time tried a new substrate combo: about 2.5-3" of Red CaribSea Eco-Complete topped with about 1-1.5" of pool filter sand. How good is red eco-complete? I did put some Osmocote Plus and muriate of potash on the very bottom (under the substrate), but was hoping that Eco-Complete (especially topped with sand, which would allow to keep nutrients from leaching into the water) would provide a good substrate for the heavy room feeders long-term. Yet, now I am reading that Eco-Complete is near-inert in terms of plants' abilities to use the nutrients??

 

[gimme30]

Sorry I'm late, but I'm new to the forum and haven't had time to butt in on everyone's posts yet. And by now you've probably already figured it out.

Anyway take this with a grain of salt, since I myself am a known and notorious plant murderer, but I think eco-complete is ideal. Reason being, it's just basalt, or lava rock. Yes it's inert but all those little nooks and crannies do a great job retaining nutrients while simultaneously allowing water/oxygen flow. Back in the UGF days it was the thing, although it wasn't marketed as a "plant" substrate. The aqua soil guys will poo poo this, but what do they know, with their award-winning tanks and all that. Showoffs. They just like to play in the mud, like a certain other mammal that tastes great on a sammich.
Shove a few root tabs down there and in 10 years laugh at the poor sods having to replace their nutrient-deficient dirt and complaining loudly about the mess the whole time.