Dump the bio balls and use live rock only. Bio Balls will develop problems
for you down the road.
"Frank" wrote in message
...
I have a 120 gal tank which I want to set up as sal****er, I've had
freshwater previously in smaller tanks, 30 gal. Now bio balls are
supposed
to be used for biological filtration. However live rock is the best
choice
for this, so are bio balls really needed? I have read the pages at
http://www.melevsreef.com/ and wow great site. I am going to build my own
sump, 48"L 12"W 24"H, and plan on designing it so that water will always
be
6" from top and 4" from top with the pump off, or so I hope. Do I really
need the bio balls if I am using 240 pounds of live rock?

Frank F.