Go

[Lance]

I've used them before. Algae Free Sure Flow Upgrade Kit gives considerably more flow from the powerhead.

Maxi Jet 400 = 1300 gph with the kit
MJ 600 = 1400 gph "
MJ 900 = 1550 gph "
MJ 1200 = 1600 gph "
MJ 1200 with large impeller = 2100 gph

You can also get the Algae Free Sure Grip magnet holder which replaces the suction cups and works well.

My biggest compl;aint with them is they are large and ugly and the flow is concentrated and should not be placed too close to corals.