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Has anyone local mod-ed a nanostream?

JayM

Is the algae gone yet?
BRS Member
There's a thread on RC, but has anyone here done one? Want to amp up the flow on both tanks......

got 3 6025's and 1 6045 to play with.

no dremel here...... :o
 
you probably won't.....
 
if you read the RC thread, there are about 5 different mods. Which one did you do? I am considering their 'full-blast' and 'wide flow' mods, but want to be careful about functionality.

I don't run a wave timer right now, and they're on 24/7. Just wondering if the mods made the kind of difference they were talking about, and how hard it is in real life to do......
 
Ah OK.
I did the wide flow mod (cutting the tube down at the end), and the initial mod that sparked the whole thing (grinding some material away in the inner shroud). Its a night and day difference, and for me, almost too much. My tank is only 24x24 and the mods are supposedly around 1100gph+, so positioning is very important (and I still have no sand in the front). I also did some mod where I took the outer cross piece that was cut off in the wide flow mod and grinded it down into a stopper. it is then held in place with glue and the screen thing. This way they always restart in the correct direction, although this is only important when I shut down to feed. Functionally, they have worked just fine, but the motors have been replaced three times prior to modding (not as a result of modding, a result of poor initial craftsmanship on Tunzes end). Assuming yours are already on the latest batch of motors from Tunze, then you should be all set. I would say work in increments, grind a bit off, try it, grind more, try it, etc. Worst comes to worst, a new shroud is $12.
 
What did you grind it with? Should I give in and buy a dremel?

I think I'm going to do the full blast mod first.......
 
Yeah I used a dremel with a hard, circular sanding bit to grind out the inside shroud. For the wide flow I just ran it through a band saw.
 
Jay, can you post a link to the mod you plan on doing?
 
so from thfirst couple pages I read-all you have to do is cut out the inside half of the plastic front to increase the flow? that seems so simple and easy to gain 400GPH...have there been any witnessed draw backs besides warranty voiding?
 
None to my knowledge. Like I said, its shockingly simple! And if you screw up somehow, a new front shroud can be ordered for like $12.
 
so from thfirst couple pages I read-all you have to do is cut out the inside half of the plastic front to increase the flow? that seems so simple and easy to gain 400GPH...have there been any witnessed draw backs besides warranty voiding?

None to my knowledge. Like I said, its shockingly simple! And if you screw up somehow, a new front shroud can be ordered for like $12.

The possible issues are that the prop might not self-correct on startup and run in reverse.

If you ordered a new front cover (since that is the only thing being changed) it does not void your warranty.

I also think you need to do more than remove the shroud for a 400GPH increase.

I'm still going to try it
 
Ive read more pages and youre right about doing more but its not that much more. Cut a few slits in the "neck" of the housing and cut out the inside tunnel and thats about it. Im going to try it on my dads 25. Ill see how it works. I dont think im going to shorten the neck for a wider flow pattern but maybe since if I dont like it I can order a new front for short money.

I always thought the 25 mod dealt with moding the prop and shaft(which is why I didnt want to) but after see that thread it seems almost too simple. Thanks Jay for bringing it to light. Those guys on RC seem to have come up with a great idea and application.
 
OK so I went home and tried it out on the 25 I have (excuse the coraline). I used my dremel and cut out about 1/2" from the neck and then used a sanding bit to smooth it out. Put it back to get and put it in the tank to see a big difference. Now I didnt go as extreme as some of the RC people did but I didnt want too much flow. I have to say it did increase the flow alot but not to the amount of a 45 and thats becuase I didnt take allof the plastic out. Ill prob. do some more mods on it but for now I kind of like the amount its pushing out. Heres some pics:

Original
tunzemod6025001.jpg

tunzemod6025003.jpg
 
Moded
tunzemod6025011.jpg

tunzemod6025012.jpg

tunzemod6025013.jpg


and heres what a person on RC name Jacmyyoung did to his...you can see the extra slits in the neck of the shroud.
jacmyoungsmod.jpg


over all ease = 10
over all performance = 10
great little mod to save money.
 
Nice pics Steve, going to buy a dremel this weekend during 'no sales tax weekend', and then try it on a new 6025 I bought yesterday @ CRA.
 
the wide flow mod probably would be good for a nano or a smaller tank. If youre trying to push 4' (like me) you might not want the flow to die out after 12" (or so).

Jay, jaymyoung did his mods on a dremel press and they came out beautifully. Good luck with the mod and keep us posted on how you like it.
 
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