If u keep the sand bed extremely thin, i.e. below 1'' and have bottom dwellers that dig; u should never have to do a sand vac. since the bed is thin and being moved around by fish, this will turn it over almost everyday!
also, having sufficient current in the tank will eliminate dead spots where material builds up. sufficient current in collaboration with the bottom dwellers will keep the material build up suspended in the water column, allowing the fillers to do their job.
having heavy sand like pool filter sand is also very helpful. since the material is being suspended u can keep the intakes high, eliminating the chance of sand being sucked up. not only that, but it will make the tank look more aesthetic since u don't have such long intakes cluttering up the tank.
also, having sufficient current in the tank will eliminate dead spots where material builds up. sufficient current in collaboration with the bottom dwellers will keep the material build up suspended in the water column, allowing the fillers to do their job.
having heavy sand like pool filter sand is also very helpful. since the material is being suspended u can keep the intakes high, eliminating the chance of sand being sucked up. not only that, but it will make the tank look more aesthetic since u don't have such long intakes cluttering up the tank.

