Jebao WP25 Information

I haven't noticed a decrease on my WP40s, but then again they were in a 100 gallon tank and dialed way back to begin with. Have one in my 150 right now and don't notice it, but it's also a FOWLR so flow is harder to see (no corals to watch react). Maybe I'll pull it out and see if it's just as slimy. I have the issue with both of my WP25. They got so slow one time my O2 levels dropped and caused a bio bloom. Cleaned them and with flow restored the bloom was gone the next day.
 
Mine didn't get better with cleaning..

Subjective? I guess so, but its pretty obvious... the first time I put this pump in my tank it ran water over the edge of my rimless 57... 6 months later not even close....

Im not knocking the pump I would buy another one....
 
I haven't noticed a decrease in my WP-25. Just wanted to know how to clean it/take it apart. I keep my powerheads clean with regular maintaince on all my ph's/pumps.....
 
I've found I need to clean the pump about twice a month to restore normal flow.

It's subjective since it's not objectively measured with a flow meter. However, immediately after cleaning the pump, I need to go from 100% power back down to 50% to make sure sand doesn't go immediately everywhere.

I slowly dial up power as time goes on to counter the slow down.

I think the motor is plenty powerful but I think the problem is that the magnet to housing ratio is probably not very tight in terms of tolerances since that would cost a lot of money to get that close. The amount of slime that builds up in the magnet area is significantly more than my other pumps of similar design in the same amount of time.
 
FlyPenFly said:
I've found I need to clean the pump about twice a month to restore normal flow.

It's subjective since it's not objectively measured with a flow meter. However, immediately after cleaning the pump, I need to go from 100% power back down to 50% to make sure sand doesn't go immediately everywhere.

I slowly dial up power as time goes on to counter the slow down.

I think the motor is plenty powerful but I think the problem is that the magnet to housing ratio is probably not very tight in terms of tolerances since that would cost a lot of money to get that close. The amount of slime that builds up in the magnet area is significantly more than my other pumps of similar design in the same amount of time.
Click to expand...

Those observations make it objective, specially having to dial it down (you are not basing anything on your personal beliefs, feelings, thoughts, etc). There isn't an exact method to measure flow in this type of pumps anyways.

I don't understand your hypothesis for the issue (in red), could you explain it a little?
 
I mean how the magnet of the impeller sits in the main pump housing, the tolerances aren't super close. I believe this allows a thicker amount of slime to accumulate which adds resistance.
 
I haven't heard they are for sale yet either.
I asked Wystan at Jebao about the reality of a WP-10 and he never answered me.
I have not heard anything definitive the there will be a WP-10 it is just a rumor until I hear from the manufacturer or see a store offering it for sale. Even a pre-order would confirm that this is going to be one.
 
The last picture I remember seeing was this one WP-60, WP-40 and WP-25

WP60image_zpsb450c049.jpg
 
FlyPenFly said:
Wasn't there a picture or youtube floating around with a WP25/40 looking pump that looked way smaller than a 25?
Click to expand...

Yes, this
<iframe width="420" height="315" src="//www.youtube.com/embed/qKkF7JELF5k" frameborder="0" allowfullscreen></iframe>
 
FlyPenFly said:
I mean how the magnet of the impeller sits in the main pump housing, the tolerances aren't super close. I believe this allows a thicker amount of slime to accumulate which adds resistance.
Click to expand...

Interesting, if I'm understanding you correctly I thought it could be the opposite. When comparing the wp25 to other propeller and impeller pumps I find the space between the magnet and the housing to be smaller, and I thought this could be a reason to slow the flow since the slime makes that space even smaller.
I still think the issue could be the motor being too weak, slime should not reduce the flow.

BTW do you use GFO? and does anyone know if small loose particles of GFO would attach to these magnets?
 
ganjero said:
Interesting, if I'm understanding you correctly I thought it could be the opposite. When comparing the wp25 to other propeller and impeller pumps I find the space between the magnet and the housing to be smaller, and I thought this could be a reason to slow the flow since the slime makes that space even smaller.
I still think the issue could be the motor being too weak, slime should not reduce the flow.

BTW do you use GFO? and does anyone know if small loose particles of GFO would attach to these magnets?
Click to expand...

Nope, I use phosguard and vinegar dosing.
 
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