Mag 12 too much for a 29g w 10g sump?

[DensityMan]

Cap 2200 died just before downsizing the 75 into a 29.

The 29 now has water in it and once it is warmed up the tank-swap will commence. Can't fathom going without a sump through and while my overflow box seemed to have plenty of flow left to give to the Cap 2200, I'm concerned about it handling the Mag 12.

The overflow siphon is handled with a single U-tube.

Any help or tips appreciated.

Thanks,

 

[sjm817]

Yes...WAY WAY too big. Id use a Mag3

 

[wetWolger]

yea, MAG 5 at max....12 is far too much

 

[xtrstangx]

Yes. A Mag 5 would be probably too much. In a 10g sump, you don't have very much horizontal room for microbubbles to dissapate.

 

[Matt Rise]

I ran a Mag 7 on my 20g when I downsized from my 46. IMO there can never be enough flow. With 350w of MH it made nice glitter lines!

 

[The Punisher]

I have a Mag 7 for my return on my 29 with a 1" overflow in an overflow box, not a U-tube, and I have it cranked down a little bit for noise reasons. I think a 12 would be way to much.

 

[sjm817]

Why dont people mention what size sump they have? A return pump is actually for sump flow, not display flow.

 

[The Punisher]

<a href=showthread.php?s=&postid=6518671#post6518671 target=_blank>Originally posted</a> by sjm817
Why dont people mention what size sump they have? A return pump is actually for sump flow, not display flow.

good point, I've got a 30 gallon sump that runs at about 70% full.

 

[10" Red Devil]

I suppose maybe you could hook the mag12 up to a ball valve and throttle it way back, might be a bit messy though at first. Although if your strapped would work for now, until you could get another u-tube or overflow capable of doing 1200-1400gph.

 

[TippyToeX]

Scott, I have a 29g with about the same sized sump. I have a mag 7 and it's throttled back some.

 

[jaypee]

By itself, the Mag12 is probably too much. I use a Mag12 on my 33g with 20g sump, but, it's run through an SCWD on the way back to the tank. Don't know exactly what the reduction is, but I estimate somewhere around 7-800 gph. Still not quite enough flow for my purposes and I'm looking into an OM squirt to replace the SCWD. I have no micro bubbles at the moment, we shall see.

 

[ferventforager]

I run a mag7 with a sqwd on my 30 gallon and I have had issues keeping the u-tube overflow quiet (even with a homemade durso)

 

[tabndust]

DensityMan you have pm

 

[DensityMan]

<a href=showthread.php?s=&postid=6518671#post6518671 target=_blank>Originally posted</a> by sjm817
Why dont people mention what size sump they have? A return pump is actually for sump flow, not display flow.

In my original post on my club's site I did put that in, must've slipped my mind here. The 29g has/will have a 10g sump.

So after all the feedback it looks like I'll need to downsize my return...

Thanks all!

 

[DrBDC]

Too much flow through a sump will compromise your skimmer output even. Flow through a sump should only be enough to feed the skimmer and maybe a tad bit extra. For instance if your skimmer feeds as 300 gph, don't send more than 350. Turnover rates should come from powerheads/closed loops.

 

[sjm817]

<a href=showthread.php?s=&postid=6519625#post6519625 target=_blank>Originally posted</a> by DensityMan
In my original post on my club's site I did put that in, must've slipped my mind here. The 29g has/will have a 10g sump.

So after all the feedback it looks like I'll need to downsize my return...

Thanks all!

I didn't mean you. You do have that info in the thread title. Yes, downsize the pump. I would use a Mag3. Use powerheads in the display for needed display flow.

What is a cap 2200?

 

[DensityMan]

<a href=showthread.php?s=&postid=6519726#post6519726 target=_blank>Originally posted</a> by sjm817
...

What is a cap 2200?

The Cap 2200 was found in the pond section of one of my LFS (merchant URL to see the product and desc. = LINK).

It served my 75g w/ 20L sump for over 2 years before dying due to a power-outage late last week (tried disassembly and cleaning to no effect).

This Mag12 was intended for the 75/20 system, but now the plan has changedof couse and it looks like I need to offload this for a smaller model. Anyone have tips on what to look for in used Mags while trading?

 

[ctreefer]

You could use the mag 12 as a closed loop with 4 outputs and then just run a smaller (mag3-5) for the return. You should get all the flow you need this way.

I have an oceanrunner 3500 which is equiv. to a mag 9.5 on my closed loop with 3 outputs and it doesn't seem to be enough, with a mag 3 for my sump

 

[idua]

<a href=showthread.php?s=&postid=6519064#post6519064 target=_blank>Originally posted</a> by jaypee
By itself, the Mag12 is probably too much. I use a Mag12 on my 33g with 20g sump, but, it's run through an SCWD on the way back to the tank. Don't know exactly what the reduction is, but I estimate somewhere around 7-800 gph. Still not quite enough flow for my purposes and I'm looking into an OM squirt to replace the SCWD. I have no micro bubbles at the moment, we shall see.

I have Mag 9.5 going through a SCWD on my 30 cube. But in my case Iââ"šÂ¬Ã¢"žÂ¢m estimating that SCWD lowers the water throughput by as much as 50% :mad2: which I way less than what Iââ"šÂ¬Ã¢"žÂ¢m looking for. Also, planning on switching to OM.

 

[DrBDC]