I have a 55 gallon freshwater tank with ADA aquasoil and have noticed that the dirt has started to have some type of brown silt forming ontop of it. It's not spread throughout the entire tank, I assume it is some type of detritus but am wondering if anyone else has seen this in their tank before.
In the past, I haven't been putting very much food into the tank as it only had shrimp, snails, and otocinclus catfish which are all algae eaters.
Is this brown silt something I should be worried about?