Reusing Substrate (Eco Complete?)
I have a bag of substrate I saved from a tank break down several years ago. I forgot I had it, so I was planning to use Black Diamond sand for the new set up, but if I can use what I already have, even better. I liked the sand because it was inert and wouldn't result in a ammonia spike like ADA Amazonia or something similar. My plan is to set up the tank heavily planted and minimize water changes.
Is there anything I should keep in mind reusing the old substrate? I know I rinsed it well and let it dry fully before I stored it. If I had to guess, I think it's probably Eco Complete but I don't remember for sure.