I did read the link posted.......very informative. Back when I started
my FOWLR setup, I put most of the live rock and base rock on the bottom
glass. I then put in the fine sand sold at my LFS to a depth of about
2 inches around the rock (not under it). At this point, I would say a
little over 1/2 of the bottom area of my tank is LR and the rest is
about a 2" sand bed.

Because of all the rock in there, do I still have enough area for sand
to create an good DSB? Should I start over or just add another 2" of
new sand to what is already there?

Thanks again.




CapFusion wrote:
wrote in message
oups.com...
Thanks for the definition. I feel better now.

One more question........

If I convert my 220 gallon FOWLR tank to a reef tank, I know I
should
have 350 or 400 pounds of LR. I have maybe 25% of that now. But
I'm
not so sure about the DSB. Do I put the 4-6 inches in the main
tank,
or in a separate tank/sump? If the answer is a separate tank/sump,
what do the dimensions of that tank need to be to handle such a
large
tank?

Thanks again for the help.


You can have DSB anywhere [main tank / sump / refugium or combination
of
all]. The more area of DSB you have the more BIOS-load your system
can
handle. You should put in the minium like 4" should be good.
Since you indicate you have 250G, that will be good area.

CapFusion,...