Is this a sand bottom? Any Live sand or Live Rock to seed it with pods and worms and stuff?
Any crabs or snails in the tank to help out?
What kind of dirt, fish waste, snail waste,chunks of food,algae?...brown or red?
For the most part a sand bed full of "infauna" and a clean up crew
should be self cleaning...
Often in an aggressive setup, lacking a full complement of cleaners you will have to "help out"
In my aggressive tank I use a "bubble vac" which DOES NOT disturb the sand bed, it just gently sucks up the uneaten food,flakes and waste that accumulate from time to time.
If it's diatoms (brown) or cyno (red) you need to look for the cause and 'fix" that...
![Cool :cool: :cool:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)