A brief review of the TUNZE DOC Skimmer 9410

rishma

New member
I have been thinking about posting a review of this skimmer for a long time, but I just haven’t gotten around to it. I have been using a 9410 for ~1 year. I am very pleased. For reference my past skimmers included high end German and Austrian machines. I liked those too but they cost a lot more.
Here is a quick pros/cons list. I know everyone likes pictures; I’ll try to come back and post some tonight.

Pros:
•quiet
•very low power consumption
•reliable - it has run without issue since day 1.
•great production, on par with my past high end skimmers
•great customer service, though I haven’t needed it in a long time
•price<$400
• unit requires minimal maintenance - I bought the optional foam extractor so I have the skimmer dump into a bucket. It shuts down automatically when the bucket is full. I need things to be idiot proof.
•The pump is capable of pulling plenty of excess air. I run the air line 1/2-3/4 open. At first this bothered me because in the past I was always trying to get more air draw from my skimmer pumps. I had never had a skimmer pump with excess performance capacity. This allows me to tweak the air draw for optimum bubble size and performance.
•The skimmer excels at skimming a little on the wet side, which is how I like it.
•I like the filter bag on the outlet, I put carbon in there.
•The small footprint is convenient.

Cons (for some people):

•The skimmer is not designed for much adjustment. At first this bothered me because all my past skimmers could be tweaked quite a lot; however, once I got the 9410 dialed in there I find no need for adjustments. To me this has become a positive feature, I just needed to get used to it.
•It is not built like a tank like some of my past skimmers. Some people like 1/4" acrylic. The 9410 skimmer body is solidly built. The stock cup is the thinner injection molded tunze cup. The optional foam extractor I use is a heavy wall acrylic. I am happy with the quality.

The 9410 meets all my requirements. I dont think I'll be tempted to buy another skimmer for a long time.

cheers
 
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I am lazy and just found some old pictures on my wife's mac. It works great!
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I agree with your review, its a great Skimmer. I've had my 9410 for about 2 years and I'm very pleased with its performance. The only thing that bothered me about it was the noise from the splashing into the post filter sock. I just recently removed the post filter sock and installed a piece of foam around the effluent pipe and now it is very quiet.
 
yep, depending on sump level there can be a trickling water sound into the filter sock. I had forgoten about this. By placing my carbon bag in the filter sock, the trickling was eliminated. A sponge is another option, but I like to capture the detritus.
 
I just wanted to point out that we now use a coarser mesh filter sock and that will likely improve on the noise issue, the original sock was 50 micron and it clogged and water spilled over and made noise, we now use 150 micron, it looks and feels like a very fine mesh fish net, it is also much easier to clean since it is a fairly heavy gauge plastic mesh.
 
Thank you for the reviews.

What is the optimum depth of water in which this skimmer needs to be placed?

Thanks
 
I know I'm brining up an old thread, but I figure it will help keep the information consolidated when searching.

I'm considering purchasing a Tunze 9410, but my sump is poorly designed and the water level in the whole sump fluctuates with evaporation. I keep the level within about a 2" range.

How sensitive is this skimmer to fluctuations in water level?
 
Breadman03 since you are in a Tunze site can I tempt you to their ATO setup so your sump will not fluctuates, it is a great investment.
 
I want to get an ATO when I upgrade my sump, but I think my skimmer is the biggest priority. I don't really have room for a reservoir currently and would like to design the sump to have an ATO reservoir on top of the sump.

I have a Coralife SS65 skimmer on a 75 gallon tank.
 
I think you will get frustrated with most high performance needlewheel skimmers if you have that mutch fluctuation. Dialing in the skimmer depends on being able to hold some variables constant, water level being the most important.

Upgrading a sump can be very cheap. For the last 5 years, I have used a 20 gal glass tank with one baffle. That makes 2 chambers, one with constant water level, the other with the return pump. The key is not over sizing the return pump, then sumps can be simple.

Good Luck.
 
Basically, the baffles weren't designed to confine evaporation to the return chamber. Don't flame me too much, as it was part of a trade, and I needed to address flow in the tank before I worried about the sump.

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I just checked my baffles. The tallest one is 6.75 inches tall. With a published immersion range of 5.5-9.4 inches, I should be able to tune it in with a stable water level.
 
Only skimmers that are not affected by water fluctuations are external skimmers. There are a new breed of skimmers that do not have a exit tubing so they have the smallest footprint of all. Cadlights makes one and a I am drawing a blank on the other one. I believe that they use a DC pump so the pump is controllable that is how you adjust it.
I would fix the ATO.
 
Does anyone know if the Tunze foam extractor 9020.140 will help me save vertical space? I have the Tunze 9410 skimmer with the standard foam cup but only an inch of space above it. So every time I clean it, I have to manipulate the whole unit sideways to remove the collection cup, risking spilling the skimmate. If the foam extractor assembled is the same height it will work for me.

Thanks,
Vijay
 
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