View Full Version : "Powerhead" vs. "Circulation Pump"

03-01-2012, 10:35 AM
Both the Koralias and the Maxi-Jets say that they can be used as either a "Powerhead" or a "Circulation Pump." I've having difficulty discerning the difference, though. Both look (and read) like they do the same thing (though the appearance is obviously different), and I can't find any posts here referencing it.

What's the difference? I know I'm just missing something.

03-01-2012, 10:49 AM
I believe a powerhead has a tighter stream and a circulation pump provides more of a wave like affect. In otherwords, a powerhead shoots water through a straw and a circulation pump is more like dumping a bowl of water in the tank. Does that make sense?

Powerheads, are generally used in undergravel filters or to run reactors, skimmers, etc.

03-01-2012, 10:56 AM
Yep. The only way I would personally use a MJ for circulation is to use one of the "mod kits" but they cost as much as the pump, so you can buy a Koralia for the same money and it looks better in the tank.

03-01-2012, 11:05 AM
I personally hate the maxijets for the sole reason that they do not have magnets. The suction cups are terrible, especially if you go with a larger MJ.

03-01-2012, 11:14 AM
And the magnet mounts are about as expensive as the pump also...

03-01-2012, 11:17 AM
I have one of the new Maxi-Jet's and it comes with a circulation pump conversion kit. The "new" maxi-jet pumps are junk and make too much noise so i just use it for water changes and mixing water in a bucket.

03-01-2012, 11:46 AM
Sounds like the confusion may be because I'm actually using the powerhead to circulate water in the tank, where one would normally use a circulation pump. So for me, the powerhead is the circulation pump.

On the advice of my LFS, I'm using the Maxi-Jet 400 set up as in Fig. 1 here: In powerhead mode, the flow is 110gph -- just right for my 5.5g.

I'm planning to use this for my 11.6g that's on the way:

Any comments on those setups?