Yea i have a BAK-PAK 2 on on my 75 gallon reef with the air pump mod to make more bubbles and the mesh mod on the impeller of the maxi jet to produce more/finer bubbles. It like a BAK-PAK on steriods.. But i know that the mesh mod put some stress on the MJ. I used to empty my skimmer cup about once a week and the skimmate was ok but with the mods i empty the cup once EVERY 2 days and it STINKS sooo bad!!!