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Tunze Nano Doc 9002 replacement pump

tygunn

tygunn

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Hmm so yesterday morning I had a scare. My tank was dead silent. Turns out the gfci tripped. The culprit is my Tunze Nano Doc 9002. The pump appears to have seized up. It did this recently and I had cleaned it out and though it was working okay again. I guess I should consider a replacement pump.

Seems those skimmers are discontinued, however, so I am curious what people have been doing to replace these pumps?

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Vhuang168 said:
Wouldn't an impeller replacement be sufficient? Or are you looking for alternatives?


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An impeller replacement might work. I'm not sure. The fact the pump trips a gfci makes me suspect it's leaking current some how. An alternative might not be a bad idea as well.

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If it's tripping the gfci, you might be right that there is an electrical short. Have you been able to replicate it?


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Vhuang168 said:
If it's tripping the gfci, you might be right that there is an electrical short. Have you been able to replicate it?


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This is the second time its done it. I'm sure if I plugged it in again it would trip. I'l try running it in a a bucket and plug it into another gfci in my appt and see if it trips.

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I cleaned up the skimmer and did a test on the pump in a bucket. It leaks 30v at around 35ma to ground. A typical gfci trips at 5-6ma, so I think I've found the culprit. I'm running it for now plugged into a non gfci outlet (I know I'm being bad). Time to figure out a replacement.

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If you need a skimmer to borrow, I have a 9004 I'm not using. Or a CADlights PL50 Elite sitting in a vinegar bath.


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Thanks for the offer. This one seems to be running okay for now. Haha although maybe i should worry more about stray current?

It looks like the 9004 is essentially the replacement for the 9002 then? How did you like it?

I haven't bought a skimmer in years!

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I like that it surface skims which is great for an in tank skimmer. Seems to skim a little wet but I have not really adjusted it much.


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Vhuang168 said:
I like that it surface skims which is great for an in tank skimmer. Seems to skim a little wet but I have not really adjusted it much.


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Ah okay so its meant for sumpless tanks I guess.

I guess I should just see about a replacement or alternative pump for the 9002....

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Tunze does still sell replacement pumps. I need to figure out how to order one still. But its a step in the right direction.

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The 9001 and new series seem aimed at skimming in tank what with the surface skimming. What is the big change you've noted? My 9002 is pretty silent now that I changed out the air valve with my own.
I'll probably just get a replacement pump -- in a few years when we get a house I plan to upgrade to a larger tank anyways. :)
 
My replacement pump arrived yesterday. Kudos to Tunze for the quick shipping. It was a quick drop in replacement, and it seems to be working better than the old one. I guess the old pump was having more issues than I thought!
 
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