[thirty5]

just because you have the pumps does not mean you have enough flow at the sand bed. But if you want to change the sand I would take some out at a time, and then to add it you can either just try to dump it in, but it will make a mess.. or get a piece of like 1.5 inch pvc and use that as like a funnel..... Stick it into the tank to the bottom and then dump the sand into the tub this will help with the cloud and can make you be able to direct it where you want.

[Jarrett]

ok thanks thirty.