Robbert and I exchanged emails a few times:
nano@euro-reef.com

awsome, thanks

Did you get a reply?

Did you get a new impeller?

My impeller is holding up ok for now (fingers crossed) but if you've yet to get a new one let me know, I'll get one too & we could maybe split the shipping.

One thing about this skimmer is that I'm having to clean the sponge out every 4-5 days or else the pump will either run intermittently & not skim at all or over flow the cup within seconds, depending on slight water level changes.

A bit high maintenance but a pretty good skimmer when it's working right.

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no i havnt orderd it.. im pretty ****ed about the hole thing. I asked him if the new impeller will last anylong and he just said it will last alot long... i asume the same thing will happen just after alonger period of time.

but i guess i should figure something out my tanks pretty messed up at the moment and im sure a good skimmer would help out a bit.

i think the only way you can get it for 12 is if yours is alread effed otherwise its 30+ $

I also got fed up with the sponge, it would quickly fill up with detritus. I just pulled the sponge out and have been running without a sponge for 2 months. Very few microbubbles in the tank. You just need to play with the "dial" on the bottom of the tube until you get the right setting.

Now i only give it a quick wipe once a month instead of a serious cleaning every week.

It is time for me to replace the mesh wheel on the two pumps. Did you receive a newer diamond mesh wheel? Did it last longer than the original?

ya, it does last longer but it wont last forever. it is still very fragile and im sure if it sucked up a bit of sand it would break it.

I have gone through two meshwheels since I got my nano skimmer in July 2009.

Around a couple of months ago I ordered 2 new meshwheels but it would be 2 weeks or so to get them delivered from the U.S. so I decided to do a foam mod to hold me over temporarily.

I got some black open-cell foam, the holes are maybe 2-3 mm size. I glued it on to the impeller where the meshwheel should go, then I trimmed it to a round disc the right size.

The foamwheel has been performing great for over two months and my two replacement impellers are sitting in a box.

I have also done a gate valve mod and the skimming is much more consistent since then.

do you have any photos of your mods that you can post. Your description of the foam sounds a bit like the foam that comes with the Little Fishes reactor???