Bderick67;4382132; said:I wouldn't waste the extra money on the XP4. You get close to the same amount of actual flow from the XP3 so all your really getting is an extra baskets worth of volume.
Myself I would run a pair of AC110s and a XP3 on both the 120 and 135g tanks.
i already have the xp4's. what about xp4, ac110 and koralia 1050 gph powerhead?