return pump on 125 while using a Gyre?

rharkins · 12/18/2014, 08:49 AM

I am in the process of building up my 125 gallon tank, 72"x18"x22 demensions. I havent purchased a return pump yet, but i was wondering how big do i really need to go?

The pump will be in-sump, i intend to have a large sump becasue i have the space for it (likely another 100 gal tank) and for circulation i have purchased a gyre already. the plumbing run is about 5 ft from the tank to the sump and it is drilled with returns in both corners.

I would imagine i dont need much of a pump if i am simply using it to feed the skimmer and make contact with the DSP in the sump, but i wanted to check with others first.

On my last setup, the return pump was part of the overall circulation in the tank but with the Gyre i really dont need anymore circulation so i am looking for advice

cheers

oscarinw · 12/18/2014, 09:08 AM

I would suggest something that delivers between 4-8 times your system volume per hour. So something at about 1,200GPH. I am liking the DC pumps precisely because I can adjust and upgrade and have been using one for about 8 months now. The Jebao DC9000 might do the trick for you.

RocketEngineer · 12/18/2014, 09:12 AM

The goal of the return pump flow is to have the water in the sump have the same water chemistry as in the display so that the skimmer and RDSB are exposed to the same concentrations as found in the rest of the setup. Without enough flow through the sump, the concentrations in the display go up as the skimmer and RDSB strip the water they are exposed to. I don't know about you but I really don't want phosphates and nitrates concentrated in my display.

While yes, the return pump only adds a small portion of the flow within the display in most setups, the point of the return pump is to have enough flow through the entire setup to keep the chemistry the same throughout.

azjohnny · 12/18/2014, 09:17 AM

I like to shoot for 3-5x the DT volume going through the sump, IMO if you go faster your filtration becomes less effective

I am not sold on the chinese DC pumps, I prefer AC pumps and if you need to back off of the flow install a ball vale at the exit of the pump. Pumps I would suggest is Sicce, Eheim and Fluval Seas

SGT_York · 12/18/2014, 10:12 AM

I'm a fan of the high flow like rocket above with the great overflow systems they have now it is easy to run 10x or more with no issues.

12/18/2014, 08:49 AM	#1
rharkins Registered Member Join Date: Nov 2014 Posts: 16	return pump on 125 while using a Gyre? I am in the process of building up my 125 gallon tank, 72"x18"x22 demensions. I havent purchased a return pump yet, but i was wondering how big do i really need to go? The pump will be in-sump, i intend to have a large sump becasue i have the space for it (likely another 100 gal tank) and for circulation i have purchased a gyre already. the plumbing run is about 5 ft from the tank to the sump and it is drilled with returns in both corners. I would imagine i dont need much of a pump if i am simply using it to feed the skimmer and make contact with the DSP in the sump, but i wanted to check with others first. On my last setup, the return pump was part of the overall circulation in the tank but with the Gyre i really dont need anymore circulation so i am looking for advice cheers

12/18/2014, 09:12 AM	#3
RocketEngineer Space is big. Join Date: Feb 2007 Location: Maryland Eastern Shore Posts: 3,226	The goal of the return pump flow is to have the water in the sump have the same water chemistry as in the display so that the skimmer and RDSB are exposed to the same concentrations as found in the rest of the setup. Without enough flow through the sump, the concentrations in the display go up as the skimmer and RDSB strip the water they are exposed to. I don't know about you but I really don't want phosphates and nitrates concentrated in my display. While yes, the return pump only adds a small portion of the flow within the display in most setups, the point of the return pump is to have enough flow through the entire setup to keep the chemistry the same throughout. __________________ -RocketEngineer "Knowledge is what you get when you read the directions, experience is what you get when you don't." - Unknown Current Tank Info: None Currently

12/18/2014, 09:08 AM	#2
oscarinw Registered Member Join Date: Apr 2010 Location: Western Massachusetts Posts: 1,091	I would suggest something that delivers between 4-8 times your system volume per hour. So something at about 1,200GPH. I am liking the DC pumps precisely because I can adjust and upgrade and have been using one for about 8 months now. The Jebao DC9000 might do the trick for you.

12/18/2014, 09:17 AM	#4
azjohnny Registered Member Join Date: Apr 2012 Location: Gold Canyon Posts: 2,914	I like to shoot for 3-5x the DT volume going through the sump, IMO if you go faster your filtration becomes less effective I am not sold on the chinese DC pumps, I prefer AC pumps and if you need to back off of the flow install a ball vale at the exit of the pump. Pumps I would suggest is Sicce, Eheim and Fluval Seas

12/18/2014, 10:12 AM	#5
SGT_York Registered Member Join Date: Sep 2012 Location: Washington State Posts: 1,746	I'm a fan of the high flow like rocket above with the great overflow systems they have now it is easy to run 10x or more with no issues.