Quote:
Originally Posted by nwbradshaw
Would the LR rubble be put in the same place as the bio balls were, in the stream of falling water?
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Typically bio-balls are suspended above the water allowing the water to trickle through them.
lr rubble would be far more effective if fully submerged so bacteria can properly build up within the
lr and on the outside. (It’s the type of bacteria that builds up inside that is most important since these types help keep your
no3 low.) Most use baffles to direct the water flow through the
lr rubble and to reduce air bubbles before the return.
If you can convert part of your sump into a lighted refugium it would help with filtration/nutrient exportation as well.
Also
lr rubble in the sump alone is not going to be sufficient for bio-filtration. You will need approximately 60-90 lbs of live rock in the main tank to handle your bio-filtration.