Pump Options for 900g per hour?

  • We are currently upgrading MFK. thanks! -neo
The two 90 degree fittings should not reduce your flow that much as long as the I.D. maintains the 16mm diameter.

Can you please post some pics, something just isn't right.

Also what are the specs for the pump?
 
can't get pics till mid week.

The setup is exactly as I said,

12" of 16mm ID hose from the Eheim 1262 into a Hydor 300w external heater which the opening looks like 12mm ID:

http://www.aquatics-online.co.uk/acatalog/eth200.jpg

but opens up and then back out into 24" of 16mm ID hose.

It then hooks over the tank as so:

eheim400431.jpg

The spec for the pump is as follows:

eheim_univ_pump_1260_1262.jpg

Could the ends of the Hydor Iline heater be the restriction or doesn't it matter as it goes back to the 16mm hose after?

eheim400431.jpg

eheim_univ_pump_1260_1262.jpg
 
I have the brand new Reeflo Blowhole on my 120 gallon and LOVE it. It comes with three setting for flow and power consumption. Way better than the quiet one and magdrive (I've had both)
 
I'm also using the Hydor with the 16mm barb fittings and have no problems with restrictions with the 1262 pump on the Eheim canister.

You could always try removing the heater and retest the pump to see if that is the problem but I don't really think it will make that much of a difference.

No problems on the pics till mid week. BTW, are you using the green Eheim hose for this setup or a thinner wall hose? I'm sure you would have noticed if you had any kinks in the hose by now if you did.

By specs, I just wanted you to verify you are using the 50 Hz pump rather than a 60 Hz pump since you are in the UK.
 
Have you tried measuring the flow right from the 12" of hose with a bucket on the ground? Maybe you have a defective pump or the impeller vanes are damaged or one is missing.

Have you opened the pump to verify the shaft isn't broken and the impeller is OK?
 
I did as you said and I got 2700lph flowing through about 18" of 16mm hose back into a bucket same height.

So I guess the pump is running fine?

What next?
 
Well, you could try additional measurements using enough 16mm I.D. hose to get from the pump up and over the tank rim to see what your actual flow rate is. If it is comparable to the Eheim head chart, then reinstall the heater and repeat the measurements. If your flow is still within the specs, your problem is with the two 90 degree bends over the tank rim.

If you are handy with doing a DIY project, you can actually bend your own J-tube using a heat gun and PVC pipe packed with sand to form the bend. Or you can use oversize 90 degree fittings to transition over the tank rim to reduce the restriction.
 
As an aside, I just measured my Eheim 2028 running through the same external heater, hosing and spray bar with end cap removed. It managed 720lph

Compare that to 1200lph through the 1262 running the same setup and I cannot see why I bothered faffing around with all this nonsense of a sump. I should have just run two canisters in the first instance.

I will do as you say by removing the 90 deg bends and see how I fare.
 
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