Thanks for all of the feedback. To me, there seems to be no reason to use the tabs, excepot maybe in areas, like where the sword is plnats, that seems to have much more regular gravel than eco complete substrate. I think I will target this specific plant, perhaps some of the other stems as well. The ecocomplete is primarily concentrated in the foreground, where I am growing out my carpet (attempting). I am sur the foxtail anmd ludwigia would benefit, as they are in the background. I don't think I'll bother with the vals.