Powerheads and Flow Pumps checked by reef math.

Display flow should be sized to the coral goal, not only the tank gallons.

Professional buying context

  • Too little flow leaves dead spots. Too much direct flow can strip tissue from LPS and irritate soft corals.
  • Check controllability, broadness of flow, glass thickness, GPH range, and whether two smaller pumps beat one large one.
  • Professional fit checks should validate the catalog value behind "target flow = display gallons x reef-goal multiplier" against the actual tank dimensions, bioload, livestock goal, and maintenance cadence.