Aqualifter pumps reeaallly slowing down!

[siskiou]

I have three aqualifter pumps that I use for top-off, and all three used to run at a steady stream.
They are about a year old, and all of them have slowed down to a crawl, meaning about a drop every 3 seconds, or somesuch.

The airline connected to them is free and clear, and the line is well submerged.

Any ideas?
Do these wear out fairly quickly?

-Susanne

[powdertang05]

im assuming the bladder that is used as the main source of move ment has wore out or is too stiff, mostlikly youll need to buy a new one.

[impur]

Did you try running some vinegar thru them?

[siskiou]

No vinegar, yet.
I've only used them for RO/DI water, so I didn't think it would be necessary, but maybe I'll give it a try.

I also found that they sell replacement diaphragms for the aqualifter online, so if the vinegar doesn't work I'll get those. Much cheaper than a new pump.