Using my sandbed from old to new tank?

[Aquattro]

If you're adding 50 pounds of currently active rock, you can do whatever you like. New sand, washed old sand, rinsed in tank water old sand, or no sand. Add rock, add water, add livestock. 50# is enough to provide filtration for your tank.

[hfp75]

Ive always reused the sandbed. I rinse it out in the yard with a garden hose......

It's like new when I'm done.... 1/2'ish full salt bucket (with sand) garden hose in & turn on. Arm goes in and start stirring. When it's virtually free of detritus into the tank it goes. Then seed it with 1-2 cups of unwashed sand or live rock that was in the sand... The critters are on the live rock as well....