What to do with my DSB

Hi yall,
This week-end i'm setting up my fuge!!! ;D To do that i'm going to set up a 20 gal tank to put all my corals in because we will be drilling the back of the tank. I was woundering what do i do with my DSB since everything is going to be out do i take the oportunity to change it or do i keep it? The top of it is pretty nasty since i have lots of algae problems but the rest doesn't look so bad. So here are my options.

1. Get it out and replace it with new.
2. Take out half of it to put in my fuge and add some to the main tank.
3. Just leave it in and put some new sand in the fuge.

Thanks in advance.

 

How old is the DSB?

 

Its been in there since the begining, about a year.

 

It is a toss up. I think I would leave it.

 

im gona agree...if you leave it...then when its done you can take off the bad top layer

 

Ok then. Now if i add new sand in the new fuge will i get a mini cycle?

 

Shouldn't as long as the main bed is functional.

 

Thanks Covey.