I used to vacuum my sand bed with each weekly water change on my 120g. Now that the tank has mature and no more algae or cyanobacteria, I only vacuum once a month. So it depends on how dirty your sandbed gets overtime.
Wow, I never even considered doing that. I thought by siphoning, the various layers of sand would be disturbed and all those anaerobic bacteria would croak as well as mess up tank dynamics
Wow, I never even considered doing that. I thought by siphoning, the various layers of sand would be disturbed and all those anaerobic bacteria would croak as well as mess up tank dynamics
If you have a DSB, I wouldn't touch it. My sandbed is only 1"-2" and it keeps my sand nice and white. You'll be surprised how much silt builds up in the sand.