Planted Tank Guru
Join Date: Dec 2017
Location: Elk Grove, California
When it comes to schooling/schoaling fish, I find background color ( darker colors pop colors), proper group levels, proper lighting for type is much more important than substrate color. This is assuming the fish primarily swim anywhere in -between the mid- to top level of the aquarium.
There are a handful of shoalers popular to aquaria that will shoal, hover in a group above substrate in the 3/4 quadrant ( bottom) of the aquarium naturally. But, they are few. Most of the time when you see this behavior in the majority of shoalers it is because their environment is causing stress.
What size is your aquarium?
What other fish do you have and how many in tank?
180 g. low tech w/ wild South American cichlids, corydoras eques, and African Congo riverine tetras.
60 g. low tech w/ F1 Alenquer pair /Stendker "Tefe" discus and wild Altum Angels
30 g. low tech w/ Wild Tucano tetras
30 g. low-tech African Biotope