Originally Posted by Gti_Leo
an external DSB
is only good just incase soemthign happens you can remove it quickly and easily, in the long run the system is better off with a full DSB
it removes the most amount of polutants rather then the smaller area that an in sump DSB
That's pretty much the exact reason I was thinking about. Even though they are smaller if anything happens or there is a need to change out sand. You can do this without crashing the system. It all depends on what you want to keep in your tank. If you want a fowlr
it's prob not needed. A full reef with sump and everything.... Yes I would add one.the purpose of a dsb
is to get rid or nitrates into nitrogen gas. An alternative is to use lots of macro algae in a sump.... Not as affective but gets the job done.
Also your question on the 1.5 in sand bed. Don't worry it is perfectly fine. Dsb
run from 3in to 6in and deeper. Just keep good current in your tank.