Jebao wavemaker keeps slowing down

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  • Andy
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Got a few Jebao SW-4 on my little tank.  But one of them keeps slowing/stopping.   I take it out, soak in vinegar and scrub the algae off, then it runs again for a couple of days...but slows right down again!   

Anyone know what the problem is?  It's only a few months old, but I got that particular one from fish street and they are being about as much use as a catflap on a submarine.

Ta

db75Reef

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Reply #1

I have 2 x RW8 - similar issue, but happens during few weeks; Couple of days after cleaning move rocks in tank, then become slower and slower; Kinda think on a replacement
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fr499y

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Reply #2

run it without the controller. I'm sure the power is the same for the pump and controller. If it doesnt slow down then its a dodgy controller. Could be the light sensor on the controller doing it.

ajm83

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Reply #3

run it without the controller. I'm sure the power is the same for the pump and controller. If it doesnt slow down then its a dodgy controller. Could be the light sensor on the controller doing it.

Don't think I can on these mate,  they've got a weird 3 pin waterproof plug and the power lead is more like a laptop plug. :(

Good point though, I'll swap the controllers around and see if the issue stays with the wavemaker or moves with the controller.

ajm83

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Reply #4

I have 2 x RW8 - similar issue, but happens during few weeks; Couple of days after cleaning move rocks in tank, then become slower and slower; Kinda think on a replacement


Yeah same,  kinda leaning towards the Tunze 6040.  Guess you'd need to go a size up to the 6055 or 6095 . 
Problem with the 6040 is the unguarded blades on the impeller. Reckon my tuxedo urchin would get turned into pâté by it!

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ajm83

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Reply #5

Took one off to soak in vinegar yesterday, and swapped the one still in the tank onto the other controller.  Problem stayed with the powerhead itself, so there must be something physically slowing it. 

Found a few people on R2R who swapped the ceramic bushing inside the wavemaker for a bit of air line hose.  Can#'t see why that would work, I thought the impeller rotated and the ceramic shaft was stationary. Maybe not though?

Getting to the point where I'm thinking of cutting my losses and putting them on ebay spares or repairs TBH

fr499y

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Reply #6

does the ceramic section move from the propeller itself? If so, glue it and try it! could be its slipping, or just generally worn :)

ajm83

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Reply #7

does the ceramic section move from the propeller itself? If so, glue it and try it! could be its slipping, or just generally worn :)

It's only a few months old so I hope it's not worn out.  I've soaked them both in vinegar  again for 3 days, so let's see how long they last!


Chalkyyy

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Reply #8

Have you tried taking it apart and cleaning it? Mine done this before after cleaning the propeller out it was back to new!


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Paddone

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Reply #9

I have had the aquamedic 4.1 powerhead that I think Jebao ripped off to create their powerheads.

I have had the aquamedic 4.1 for a year on 80% on random (continuously switches through all the various settings including losts of on and off and ramp up and down) and it hasn’t skipped a beat. I’m very happy with it.

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Reply #10

I always found that pulling the plug out a little and arcing it a few times, would always cough out a load of mulm and build up and efficient them up a bit.

Won’t work if they’ve got soft start, etc.  :|
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ajm83

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Reply #11

I always found that pulling the plug out a little and arcing it a few times, would always cough out a load of mulm and build up and efficient them up a bit.

Won’t work if they’ve got soft start, etc.  :|

Haha like it, sadly it's a dc 12v pump so don't think that's gonna work.


Have you tried taking it apart and cleaning it? Mine done this before after cleaning the propeller out it was back to new!


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Yeah, have done.  Bloody thing has slowed right down again already. Might try soaking the ceramics in some stronger acid...

I think the problem is the ceramics aren't all perfectly sized so some seize as soon as they get the slightly bit of calcium build up on them

chilliman

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Reply #12

if any good to you i have got a  full spare  Jebao SW-4 spare in full working order had no problems of it slowing down,used it in my nano tank and then used it for mixing salt up for the big tank i had.
the only thing missing is the round magnet that go on the out side of the glass lost it in the garage some where apart from that in full working order £25 plus p&P

ajm83

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Reply #13

I soaked it in vinegar again after my last post and it ran perfectly until today.  I switched it off, and when it came back on it was running in reverse.  lol eff knows what's going on with it...

After doing the IT Crowd "off and on again" a few times, it did go forwards again. Weird tho

if any good to you i have got a  full spare  Jebao SW-4 spare in full working order had no problems of it slowing down,used it in my nano tank and then used it for mixing salt up for the big tank i had.
the only thing missing is the round magnet that go on the out side of the glass lost it in the garage some where apart from that in full working order £25 plus p&P
Thanks mate but if I replace it, it'll be for a Tunze or something. 

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