75 Gal with Mag 18

Al

its my nanno fed from the main sump, it opens into two 1" lines on oposit sides of the tank (also have a maxijet1200 in ther) it gives a gentle current that my torch, frogspawn and brain seam to like.

Steve

94 gal?? Is that a "cube" tank??

Thanks again Steve!! (Man your full of good info tonight... :razz: )

I think I shall probably go with a Mag 9 in the sump for my 40 gal tank.
That should give me about ~14x turnover rate after head loss.
Then I can always add a few of those new powerheads like you suggested if I find there is not enough turbulence for my liking. :mrgreen:

Tank
 

I run a mak 4 on a 75 gln tank, split into 2 returns, one note I wanted to add, was a lot of people do use powerheads to add extra flow in their tank, but u must b careful in that every piece that u add it will also add heat, in fact every power head will add appr 1-2 degrees of heat to a tank, well at least to my 75 gln tank, to a larger tank they proably do not add quite as much, but u get the gist of what I am tanking about, also an inline pump does not add quite as much heat as a in sump pump does.

So something to keep in mind unless u already have a chiller, and in that case it really does not matter.

Adie

now I 'm wondering
 

do I have enough turnover? Running a mag 12 and a mag 7 plus a couple power heads in my 180. Still have a couple of low flow areas behind my rocks but everything in the tank has some motion to it.

almost, it is a 36" x 24" x 25"

Steve

It looks like a lot of people here are trying to supply the tank water movement with their return pump. In fact, the slower the flow thru the sump, the more time the skimmer/heater/etc have to act on the water. You don't want to create 10x your tank volume goig thru your sump!
For intank circulation, rely more on powerheads or closed loop setups. This lets you customize your flow as your corals grow. I recall when I first setup a tank and tried to get my MAG 12 to output in several locations, and in the end each output had almost no noticealbe flow. After plumbing losses, each output maybe had 300gph flow, which is equivelent to a regular powerhead. And unless you have a smaller tank with a huge pump, that may not supply enough flow to keep detritus supended of to provide optimum growth for the corals.
As to the heat comment, I don't notice any heat generated from my 2 streams, 1 powerhead or MAG 12 submerged pump. But my tank is a larger volume, so it might be aconcern on smaller tanks.
Just something to think about...

Re: now I 'm wondering
 

More powerheads - try a couple of those new Rio Seio and see how it goes.

Steve dropped by last night with a couple of new Seio's he just bought. Pretty slick looking little pumps. With all th eattachments off, they look like small Streams. I'm anxious to see them working, I'll probably end up getting one myself.