I like Eco-Complete, but the inconsistencies in batches have really turned me off the product. If I were starting up a new aquarium I think I'd blend Seachem Flourite Black with Flourite Black Sand.
In regards to that linked substrate, search for 'soil master select' otherwise known as 'SMS' and you'll find all the information you need.
In regards to that linked substrate, search for 'soil master select' otherwise known as 'SMS' and you'll find all the information you need.