Jebao Dosing pump thread.
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xtlosx
Just Reefin'
I am beginning to dose on a lightly stocked frag tank, so I need small increments. With my RKL + BRS dosers I would be able to run the doser for 10 seconds or whatever an hour, thus being much less than 1ml until I got to where I wanted.
I chose to dose 2x a day, 1ml each time over 10 minutes each time. What two times of the day will it choose?
swk
New member
You can't pick the flow rate. If that unit Runs for 10 min it'll dose WAY more than 1ml
It does not offer that sort of controllability. Most pumps don't. IIRC, you program the time of day it runs. It doesn't do it automatically.
I had mine for a week before I sent it back to China and that was months ago.
MMM33732
New member
Right, you essentially pick the time of day and amount you want to dose at that time. Repeated (but able to change times and doses) for up to 24 times a day or as little as one time a month. It powers the pump head to dispense the required amount set. There is no "over x time period" per dose. So if you tell it to dose 20mL, it'll activate the pump head for roughly 20 seconds (until 20mL is dispensed), then shut off until the next program is set to dispense. If you only need 2mL per day, I would recommend doing a 4mL dose ever other day as 1mL per time is a very small amount and more likely to be inaccurate. Or better yet diluted as others have brought up.
Cheezefrog
New member
I am. getting 2mL+ out of this when I am selecting 1mL. I just purchased this, I calibrated it as following I think my value for 100mL was 201 for the pump calibration when it had filled 100mL of solution. Switched out different air hose sizes as well. I know its fairly precise but I'm using this for a nano so I'm needing it to work perfectly with single digit mL dosing. Any thoughts?
swk
New member
Dilute your solutions so you can dose a higher amount where the unit is more accurate. This will work for ca and alk and a few other things, but won't work for vinegar as bacteria will grow in the reservoir.
Hope this helps!
Cheezefrog
New member
I tried 3/16" and 5/16" tubing but with RO/DI water. I had the hoses completely filled before I started to calibrate and/or measure the amount disbursed.
I am using ESV so I don't really want to mess too much with the diluting of the two part that much. I guess if I can't dial it in accurately I'll have to return it...dang was hoping it would have worked out for my situation.
DamonG
New member
I know exactly what your saying. Mine is doing the same thing. You can do as the other mentioned by diluting your solution: 50/50 mix of half of your full strength solution with the same amount of water, dosed the same time will yield 50% of what it's actually putting out.
Example :
2ml full strength dilution : 50% full strength with 50% ro/di dosed at 2ml will be actually 1ml of the full strength solution because you've mixed half with ro water. It will send 2ml out of the pump at 50% of 100% solution. So your actually dosing 1ml..
It sounds complicated, but just mix up say 250ml of say alk with 250ml of ro/di and leave your dosing the same. Just, if you want 4ml per day, at the pump head at 4x 1ml per day, and only use the half strength solution. That's what i did to overcome its little limitation..
It's actually easier this way for calcium, alkalinity and magnesium for me, as i can dose more times a day at lesser amounts and nit hit the system so hard at once..
Or for small amounts such as 10ml, just dose 1ml 5x a day within the pump. Just because you know it's going to send out 2ml each time. You'll still end up with 10ml power day and you don't have to mess with your 2 part solution at all..
Hope this helps a little..
Reef junky 305
New member
Two of my pumps will not stop dripping. . Could the pumps be bad ?
wilkerschnepf
New member
I have the same experience. The pumps do not seem to "hold" the liquid. I just moved my dosing containers to the same hight of the output level of my lines. Hope that makes sense.
slfCaptain
Premium Member
I went through two if these pump because the lines kept draining. The pump head wasnt pinching the tube enough to keep liquid from draining back into the reservoir. Shipped the back and will try a bubble magus.
wilkerschnepf
New member
Just an update, my doser has been running about two months now and seems to have "broken in" I have not noticed a drip or drop in fluid from any of the pumps in the last week. I am dosing 80ml daily on each pump. For the first 6-7 weeks I would notice a line or two would drain back to my holding containers, not consistently but at least once every two days i would see a line not full. Seems patience is key, like all things in this hobby. I guess if you are trying to resolve a similar issue you could speed up the break in by running about 4000 ml through it and then check it.
Very happy with my doser now!
Very happy with my doser now!
+1 any advice ?
swk
New member
Jebao Dosing pump thread.
The pump heads are bad. The rollers are not pinching the tubing off enough to keep the fluid in line. Need to replace all the pumps that do that otherwise you risk overdosing whatever you are dosing with them
The pump heads are bad. The rollers are not pinching the tubing off enough to keep the fluid in line. Need to replace all the pumps that do that otherwise you risk overdosing whatever you are dosing with them
I havent started dosing yet. Waiting to get my fragtank onlineHere is my experience with this doser. In a nutshell, you might want to inspect the pump head assembly because it appears that mine were installed in reverse.
Here are the events that led me to this conclusion;
I acquired my unit about a month ago. During calibration, pump head number two began to slip (motor was still going but the three rollers were not rotating). I could hear the sound change as it slipped on and off. I could also confirm this visually. Even if I managed to complete calibration with no slipping events, when I set the doser to dose, the heads would slip around five or six times out of ten tries. This resulted in under dosing. I returned it and got another unit. During calibration of this second unit, three out of the four heads slipped on multiple attempts. Needles to say, I had lost confidence in the dosing heads and thought I had wasted my money. I went on-line and did some searching and while doing that, I found someone disassembling one of these dosing heads. It was not the exact one installed in the Jebao doser but the design was the same. I took apart the dosing heads in my unit and I noticed that the way the roller heads were inserted in the pump housing was reversed when compared to the one I saw on-line. I reversed mine to look like the one on-line, I calibrated and tested and tested and tested... It’s been over two weeks and I have not seen one failure in any of the four heads. I have monitored the dosages and they are all spot on. At this point my confidence has been restored.
I did a search on-line to look for an illustration to attach to this response to provide a visual and I found this RC link which supports my finding as well. This is a Marine Magic doser but the design for the dosing head is the same.
(To be clear assembly A in the link below is the way I have installed the rollers in my pump heads)
http://www.reefcentral.com/forums/showthread.php?t=2123530
I don’t know who I can contact to confirm that this is the proper installation but it seems that assembling them this way allows the dosing tubing to tighten/wrap down on the roller heads better against the motor axis and prevent slipping and also possibly create a better seal against the tubing thus preventing the fluid to back siphon.
I don’t know if Jebao assembles all the doser heads in this manner or if this was just a case of one assembler that was miss instructed or not paying attention. Or maybe Jebao received them this way from their source…
I hope this helps someone.
I would also like if possible, for those of you that open your pump heads to compare which way they are assembled and let us know your findings. Specially if you have other brands but with similarly designed pump heads.
Here are the events that led me to this conclusion;
I acquired my unit about a month ago. During calibration, pump head number two began to slip (motor was still going but the three rollers were not rotating). I could hear the sound change as it slipped on and off. I could also confirm this visually. Even if I managed to complete calibration with no slipping events, when I set the doser to dose, the heads would slip around five or six times out of ten tries. This resulted in under dosing. I returned it and got another unit. During calibration of this second unit, three out of the four heads slipped on multiple attempts. Needles to say, I had lost confidence in the dosing heads and thought I had wasted my money. I went on-line and did some searching and while doing that, I found someone disassembling one of these dosing heads. It was not the exact one installed in the Jebao doser but the design was the same. I took apart the dosing heads in my unit and I noticed that the way the roller heads were inserted in the pump housing was reversed when compared to the one I saw on-line. I reversed mine to look like the one on-line, I calibrated and tested and tested and tested... It’s been over two weeks and I have not seen one failure in any of the four heads. I have monitored the dosages and they are all spot on. At this point my confidence has been restored.
I did a search on-line to look for an illustration to attach to this response to provide a visual and I found this RC link which supports my finding as well. This is a Marine Magic doser but the design for the dosing head is the same.
(To be clear assembly A in the link below is the way I have installed the rollers in my pump heads)
http://www.reefcentral.com/forums/showthread.php?t=2123530
I don’t know who I can contact to confirm that this is the proper installation but it seems that assembling them this way allows the dosing tubing to tighten/wrap down on the roller heads better against the motor axis and prevent slipping and also possibly create a better seal against the tubing thus preventing the fluid to back siphon.
I don’t know if Jebao assembles all the doser heads in this manner or if this was just a case of one assembler that was miss instructed or not paying attention. Or maybe Jebao received them this way from their source…
I hope this helps someone.
I would also like if possible, for those of you that open your pump heads to compare which way they are assembled and let us know your findings. Specially if you have other brands but with similarly designed pump heads.
Last edited:
asylumdown
New member
My 2 cents - I have used a GHL doing unit for years. It was in storage for a couple of years while my house got built, and when I set it back up for the first time the LED display was toast. Bought a second one that was 'brand new' from a fellow reefer - it's LED display was also toast. Was able to at least infer some of the numbers of the first unit, so I kept using that one until I got the Jaebo.
This thing - seems as robust as the GHL in terms of construction (the GHL's feel like hollow plastic boxes as much as this thing does), but obviously all the parts are cheaper. Not as nice to program, but it's sort of nice that I get to decide how much at each interval, even if it's a PITA to program 12 intervals for three different pumps. Perhaps it won't last, but for $120 CAD shipped compared to the nearly $500 I'd pay for another GHL with 4 dosing channels... I don't really care. I bought this thing for a little more than the extra peristaltic pump that I bought for my GHL unit.
So far the thing is cheap and cheerful, and I like that. If it melts down... I still have two GHL's sitting my garage with nearly unreadable screens I could use in a pinch.
This thing - seems as robust as the GHL in terms of construction (the GHL's feel like hollow plastic boxes as much as this thing does), but obviously all the parts are cheaper. Not as nice to program, but it's sort of nice that I get to decide how much at each interval, even if it's a PITA to program 12 intervals for three different pumps. Perhaps it won't last, but for $120 CAD shipped compared to the nearly $500 I'd pay for another GHL with 4 dosing channels... I don't really care. I bought this thing for a little more than the extra peristaltic pump that I bought for my GHL unit.
So far the thing is cheap and cheerful, and I like that. If it melts down... I still have two GHL's sitting my garage with nearly unreadable screens I could use in a pinch.
nightOwl
Premium Member
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