Stir the sandbed daily, or at least every other day.
I also put a sock in my sump, start a siphon with a 1/2" vinyl hose, put other end in the sock, and suck out the top layer of sand where all the junk is.
I then put that sand into a bucket with bleach for a couple days. Rinse in RO/DI, leave in bucket of RO/DI with a bit of prime. Let air dry after a few days, add back into the tank at a later date.
Dosing live phyto helps to out compete some of the stuff that likes to grow on your sandbed too.
I also put a sock in my sump, start a siphon with a 1/2" vinyl hose, put other end in the sock, and suck out the top layer of sand where all the junk is.
I then put that sand into a bucket with bleach for a couple days. Rinse in RO/DI, leave in bucket of RO/DI with a bit of prime. Let air dry after a few days, add back into the tank at a later date.
Dosing live phyto helps to out compete some of the stuff that likes to grow on your sandbed too.