i have floramax in one tank and ecocomplete in another. I mixed the floramax with some multicolored 3m colorquartz. The floramax seems to have more texture,sharper edges, or something. Either way, I keep cories and plecos on it without any issue. Both are nice substrate choices, although I've really taken a liking to the look of oil-dri, so much so that I capped the soil in my 125 with it. (not to mention its ultra cheap)