Substrate?
I have been doing research on substrate for adfs and I don't know what to get. Some say bare bottom, others say the reflection makes them stressed. Some say fine sand because it can pass through their system, others say it will still hurt them. Some say 5mm+ gravel, others say thats too small. And some say river rocks, others say that will be too many cracks food can fall in. Im so lost please comment what you use personally