Given what you now have, I'd just leave things the way they are.
If you want a darkwer substrate for asethetic reasons, then the ADA As is a goiod choice. EC is not any different than Fluorite, ADA As is quite differetn than these two(ADA have soft texture, more uniform grain size, macro nutrients like N and P).
Hi I am new to the sight and looking for some objective advice. I had to take my tank as I am moving to San Francisco and will start it up in a few weeks. My tank is a 16 gallow bow front and will be low tech, but heavily planted. There is a store near me that sells all ada products. So I was very interested in trying ada amazonia. In the past I have use seachem flourtie and overall really no complaints. I have read so many good things about amazonia thought I would try it since it is local. However, I have read a bunch of horror stories about it clouding up the water really badly for weeks/months and then once settled if you rearrange plants again the same issue. I understand it realeases ammonia so I am prepared to deal with that. So I trying to get a better understanding of how bad this clouding issue is when the substrate is disturbed. Especially since i have a habit of rearrange plants often.