i just received 2 bags of the Eco-Complete and added both to my new tank. One was completely black with fine granules and the other had some lighter granules. There is one slightly larger piece slightly smaller than a dime, but it looks more like a pebble so it doesn't bother me.
I simply mixed the two together though I was hoping for a black substrate as advertised. I haven't opened the other bag.
I doubt they would pay return shipping for these so I'm just leaving it as is. I doubt I'll purchase this brand in the future though due to the incosistancy.
I sent an email to
tech@caribsea.com I suggest you do the same as strength is in numbers.