Eheim 2026 Pro. II

Tug

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:eek: I've taken an Eheim 2026 Pro. II, closed the hose connection off, turned off the pump and then forgot to open the lines back up when the pump was running. What does that do? The pump ran for a few hours before I realized what I had done. Now it runs, but I feel like I'm getting less flow. Anyone have a pump they can recommend. :(
 

Joe3329

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Was the canister full of water when this happened? If so, you may not have done any damage. Many pumps will run without damage at zero flow. I have 2 2026s and I ran one semi-dry for a few minutes once. That caused the magnet on the impeller to crack. This caused reduced flow and noise. It was a simple job to replace the impeller. The ceramic shaft is also easily replaced if it is damaged. I think you can salvage your 2026.
 

Tug

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Fortunately it had water in it and the magnet and shaft seam fine, but I might take another look. I had thought Eheim would do something to safeguard their pumps against zero flow. I just didn't know how or if it could be a problem. I might just be imagining it's flow is off. Thanks Joe
 

Tug

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Fortunately it had water in it and the magnet and shaft seam fine, but I might take another look. I had thought Eheim would do something to safeguard their pumps against zero flow. I just didn't know how or if it could be a problem. I might just be imagining it's flow is off. I removed the useless flow indicator but that didn't seem to change anything. Thanks Joe
 

shoggoth43

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It's likely in your head. Damage to pumps is usually pretty noticeable. Was it warm at all when you discovered it? Worst case I would give it a solid cleaning just to flush out any buildup of bacterial toxins and such. Otherwise it's probably fine.

-
S
 

Matt F.

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Not to drag up a very old topic, but...
I run both my 2026 and 2028 with zero flow while doing my weekly maintenance. No damage at all. I have the flow off for over an hour sometimes.
 

detlef

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You are dead on Matt,

that's what I do as well. While maintaining the tank or working on plants I usually close the return hose for minutes or even up to an hour or more till work is done. No damage to the canister with zero flow for years (no, not an Eheim even). The build-up of toxins or reduced oxygen after the out take was opened again might be problematic to the tank and should be avoided by discarding the first few liters of water.

Regards, Detlef.