External Pump

[blando]

Hello,

I am looking for an external pump. This is only for a 20 gallon tank. The ones i am finding are like 100 or more and is pushing to much GPH. I believe for a 20 gallon tank i only need about 100 GPH. I heard Mag Drive has some external but i can not find anything. Any ideas?

 

[BL1]

These ones say they can be used in-line, which I read as external.

http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=4590

The 500gph is measured at the pump, it'd be less if pumping up to the tank.

 

[blando]

Yeah i saw that one but the frag tank is only 3ft to 4ft high from the pump. I think 500 is to much for that.

 

[blando]

i saw this one but it is like the same price as the one you are showing me.

http://www.marinedepot.com/Danner_M...ps-Danner_Mfg.-DN1119-FIWPSBUF-DN1119-vi.html

 

[BL1]

I saw that one but, on their main page for mag-drives here, http://www.marinedepot.com/powerheads_pumps_danner_mag_drive_supreme-ap.html

It has this note ...."
Note: Mag-Drive pumps are not recommended for external use."

So if you were to order that one I'd definitely call and verify with them first.

 

[BL1]

Also by their head loss chart at 3-4' you're looking at the pump I listed giving you about 335-270gph. That's with straight piping, any elbows or valves will further cut down that flow rate.
Even at 335 I don't think you're pushing it for your tank. In my old 28g tank I was running two 300gph return pumps and those only had 6" of head-loss.

 

[blando]

Yea true. I can also buy a ball valve and just adjust it if it is to much. Thank you BL1! Merry Xmas!

 

[kbuser92]

+1 Brian. I have a koralia 425 and another on the way in my 20 long, so I doubt 25-400 at the surface would do any damage. Just get the return in the water pointed up and you've got some great surface agitation. I also have a HOB with rubble pushing probably 120-150 gph and don't see any negative side effects.

 

[BL1]

Yea true. I can also buy a ball valve and just adjust it if it is to much. Thank you BL1! Merry Xmas!

Yup sure can. You're welcome and Merry Christmas!

 

[Northstar24]

Just make sure that valve is on the OUTPUT side of the pump, not the intake

 

[blando]

Awesome. Thanks everyone for your advise. Hope everyone Xmas was great :) .