I have a 20 gallon low tech planted tank. On the substrate fish poop, plant matter, and detritus fill up. This doesn't create a nutrient or algae problem because my plants eat it all up but it is very unsighty. Most of the fish and plants I have like slow currents and increasing the filter will kill my fry, shrimp and shrimplets. I was thinking that mts can bury the gunk . Or can something eat it?