Tunze Nano Streams

[Rippin]

Well, just installed two 6025 nanostreams in the 50g aquarium.

This was the setup BEFORE the Tunze powerheads:
Seio 1500
Fluval 303 (for carbon and surface aggitation)
Deltec MCE 600, which actually has a decent amount of flow for a HOB skimmer.

The two 6025 replaces the Seio and the Fluval 303 canister.

The flow is now slightly greater and definitely more diverse.
It's actually quite amazing - if you place your hand in front of the Nanostreams it doesn't feel as strong as the Seio 1500, but it does just as good a job for flow.

Installation was quite easy, although you have to take some precaution as the plastics are thinner than standard powerheads. Definitely take seriously the warning of placing the two magnets close to each other. If they are within a few inches of each other they will snap together and you'll have a h&ll of a time trying to get them apart. Don't use this product if you have a pacemaker
With 3/8 of an inch of glass between them, it's no problem.

Start-up was almost immediate. If you hear some clanking on start-up, disconnect the power and try connecting again. It shouldn't take more than a couple of tries to get it running in the correct flow direction.

Noise-wise it's a bit louder than the Seio 1500 which is very quiet, even more so for it's size.

IMHO, two 6025 is enough for a 50 gallon aquarium. In conjunction with the Deltec skimmer, total flow and coverage is almost perfect. I have about 65 lbs of live rock.

We will see how this product fairs in the long run.

Cheers.

[Der_Iron_Chef]

I'm frustrated for the second time with my second Tunze Nanostream 6025. The first time, the impeller shaft rusted/broke up, like mentioned above. So, it was replaced by the retailer.

I just turned off the pump to feed the fish, and now it won't restart. I know people are mentioning having to reset it a dozen+ times....grrrr. What does "reset" mean anyway? Unplug-plug...and repeat X12...or until it starts?

I'm just suprised that Tunze has marketed a product which seams to have an increasing number of emerging design flaws. I will say that, when it's operating, it operates well. So I'm not completely un-sold on this item :-)

[Dave C]

Yeah, I turn it off and on until it stays on. You have to give it about 5 seconds before you decide it's not going to fire up. Sometimes it kicks in during that time. It's completely random too, sometimes it works right away, others not.

[OCDP]

Originally Posted by Dave C

Yeah, I turn it off and on until it stays on. You have to give it about 5 seconds before you decide it's not going to fire up. Sometimes it kicks in during that time. It's completely random too, sometimes it works right away, others not.

Have the same problem. Mine just takes a few plug-in/un-plug and it will kick on. Mine has been up a few weeks and I haven't noticed any problems otherwise. Weird for a Tunze product to have so many flaws. I mean.. there's quite a few with this product. It's a scary thought when you hear of the "C" clamp notches breaking off... eesh... that could be really nasty .

[GrimReefer]

I just set up my two 6025s last night in my 30 gallon. The first one I plugged in started in reverse. Unplugged it...plugged it back in and it was working. These replaced 3 aquaclear powerheads and I don't have any experience with anything but powerheads. But I don't have any complaints after a day of use. Nice even flow and the whole tank is churning nicely now. I'll post any problems I have with them.

[GMGQ]

Have you guys tried using a turkey baster or something to kinda 'push' some water on the propellor to give it a bit of a winding start? I believe these things work on electromagnets, so maybe something wasnt lined up properly.

(Or maybe it's cuz I just watched the DVD Flyboys, and remember them push starting the propellors of their old airplanes :P)

Originally Posted by Dave C

Yeah, I turn it off and on until it stays on. You have to give it about 5 seconds before you decide it's not going to fire up. Sometimes it kicks in during that time. It's completely random too, sometimes it works right away, others not.

[Okguy]

I'm curious to hear from people who have owned these for longer than 4 months.

I got 2 6025's last February and within 3 months the impeller was rusted. I returned them to J&L with no issues and got new ones. I've now had these ones running for 5 months and despite being extremely careful when handling the pumps, the plastic tabs on 1 have broken off and the clamp on the other just shattered in my hands. On top of that both impellers have started to rust again.

There were rumors that the some of the first batch were defective but I'm beginning to wonder if the whole design is flawed. I'm going to return these one's the next time I'm down at the coast but I really don't want to be doing this every 3-5 months until the warranty ends.

Has anyone else experienced this problem or am I just incredibly unlucky?

[fencer]

I have some used Tunzes. They work fine. I did inspect the shaft and the magnetic core. The shaft appears to be rusting. There seems to be some wear to one side of the core as well. Hydors I have had for 4 months(new) and the shafts are starting to corrode too but cores are not wearing. The wear problem is a design flaw in the Tunze. In Hydors the shaft is stablized on both ends and tunze only on one end(at least the ones I have) So my point is if the tunzes become unbalance wear quickly results. I had both on a wave maker and each time the tunzes started up it would make the worst noise. The hydor signifigantly less. Oh yes, the mounting bracket stubs on tunzes fracture very easily.

[shelleyr]

I am on my second round of nanostream 6025's. First 2 rusted impellers and 1 broken bracket - the plastic also seemed to just dissolve. Now 4 months later another rusted impeller on one and broken bracket on the other of the replacements. J&L is replacing them but how many times? Not too impressed with these.