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View Full Version : What Size Pump?


leonel04
04/17/2008, 03:22 PM
Hi all, i'm setting up a 125 gal. tank and will like to know what size pump will best in terms of GPH?. Thanks

46FiatYamaha
04/17/2008, 03:29 PM
on my 120 I'm personally going with a reeflo snapper, and with a 4' head it's around 1800 GPH, which is good enough for me

leonel04
04/17/2008, 03:42 PM
thanks..

leonel04
04/17/2008, 03:43 PM
i was told it should be about 1000 GPH..

leonel04
04/17/2008, 03:44 PM
Need more advice please...

sjm817
04/17/2008, 03:52 PM
You mean a return pump? How big is the sump? In general, a return pump should be 3 - 5x display size after headloss, so 375 - 625 GPH or so. For a powerhead or closed loop pump, a lot more than that depending on what corals you keep.

leonel04
04/17/2008, 04:08 PM
125gag display and a 40 gal sump..

eddnyster
04/17/2008, 04:41 PM
are you on a budget? is it a "standard" setup or is your sump in a different location than your tank like in the basement? Is your concern temp, noise, head pressure?

leonel04
04/17/2008, 07:40 PM
No budget, it's standard set up, temp may be a little concern. thanks..

SaltyMember
04/17/2008, 09:28 PM
I use a Mag 9.5 for my 125gal FOWLR. It works well for me.

eddnyster
04/17/2008, 10:23 PM
Mag 9.5 add heat to the water if just simply drop them in. However, the manufacturer does NOT recommend this pump to be used externally. Very good performer though. The 3 MDQX-SC from Little Giant is pretty good performer, but it runs rather warm. Blueline (panworld) 50PX-X has almost identical flow rates as the Little Giant except that they DO run cooler and supposedly quieter.

Sequence Snapper, obviously being at the top of the list but maybe to much flow through the sump for your skimmer to catch everything passing by.

Oh, the reason why I asked about the NOISE issue is because Blueline has a VELOCITY series pump or Poseidon pumps (same thing just named differently) which are DEAD silent but add heat to the water.

leonel04
04/18/2008, 02:34 PM
So you think Little Giant is the one i should go with?

SkyPapa
04/18/2008, 03:39 PM
The 3 MDQX-SC from Little Giant is not very quiet IMO.
The panworld may be quieter but no experience.
I replaced my 3 MDQX-SC with a Gen-X 40 and it is much quieter.

leonel04
04/18/2008, 05:06 PM
thanks, more advice please..

eddnyster
04/18/2008, 10:03 PM
GEN-X 40 has almost exactly the same flow rate as the LG 3 MDQX-SC. LG uses 0.9 amps and GEN X a little more electricity at 1.2 amps. I run my LG in my room and doesn't bother me...it's just a slight humming noise. However, like I mentioned before Velocity/Poseidon Series pumps are DEAD silent and use 1.3 amps but add heat to the water.

kgross
04/19/2008, 12:43 AM
What other flow devices are you going to have in your tank?

For a return pump the Genx mak 4 is great, but depending on your overflow setup and sump config it could be more flow than you need, but you will still need lot more flow in the tank depending on what corals you want to keep.

Kim

leonel04
04/19/2008, 08:12 AM
It's a RR tank, with a couple of tunze 6060 and two 6025, 40 gal breeder sump, and it will be mix tank.. Thanks..

das75
04/19/2008, 08:50 AM
Think of the basic purpose of the sump. A place for filtration, so in theory, your return pump can be no bigger than the gph rating of your skimmer.

Balance this against, are you relying on other circulation in the tank (CL or PHs) or is your return pump is to provide it. The other thing to consider is the sump going to be a combined refugium, if so need to determine how much turn over you want there and if the GPH rating of the skimmer/ return pump, going to give it.

leonel04
04/20/2008, 08:03 AM
das75 thanks for the info, i'll keep it in mind...

46FiatYamaha
04/20/2008, 08:36 AM
I'm not going to run the snapper at full power, it'll have a tee and a ball valve on the output and back to the sump so I can adjust how much actually goes back to the display, like this http://www.melevsreef.com/return.jpg Also, when your max output of the pump is very close to what you need instead of more, you have to be more cautious about the plumbing, such as how many 90's and things like that. With more power you can do what you want, and then open or close the ball valve until the amount returned is just right :)

leonel04
04/20/2008, 09:16 AM
46fiat, very good info, that's something i'll try to do. i like that...thanks

46FiatYamaha
04/20/2008, 11:37 AM
no problem, glad I could help

leonel04
04/20/2008, 12:59 PM
46Fiat, can you post some pics of your set up? will love to see it.. If it's too much work don't worry about it.. Thanks....

46FiatYamaha
04/20/2008, 06:24 PM
It's actually a build in progress, I'm getting the pump as soon as my funds allow (being split between several hobbies) but when it's finished I would be glad to post some pics

leonel04
04/20/2008, 06:38 PM
Thank you so muchhhh, good luck with new project....

leonel04
04/20/2008, 06:38 PM
Thank you so much, good luck with new project....

46FiatYamaha
04/20/2008, 06:41 PM
good luck to you as well:thumbsup:

leonel04
04/20/2008, 06:47 PM
THANKS..