There is not enough sand in the tank for it to become anaerobic. You need 3" minimum for it to work for your NO3 reduction any less keep it at 1/2"
__________________
150 Gal system 3'x3' 400W M/H, Bekett skimmer, Dart return,1/4 HP Chiller
180 Gal Drop tank, LED lights, Bubble master 250 skimmer,Hammerhead on a closed loop, Speed wave return.
|