Brasil Reef - Fórum de Aquário - Aquarismo - Marinho, Corais e Água Doce

I wanted to give the impressions i have had over the last week of using the DP-4 dosing pump by Jebao.

Check it out here: https://www.reefbreeders.com/shop/je...4-dosing-pump/

Ill start of by saying that the doser is cheap. I mean really cheap. I got mine for around $100 at a local shop. The price for the unit is significantly less than other competitors units. With a price that low, you should expect there do be a quality difference; but is the difference big enough to warrant purchasing a more expensive pump?

The user interface is pretty easy to get the hang of. You can manually dose each pump individually, calibrate each pump individually, and program each pump individually. The unit does not lose your settings in the event of a power failure.

The user manual is horrible. It provides little direction and barely even makes sense. Don't even read it. Search online for alternative user manuals.

Programming the module takes a little time using the display and arrow/enter buttons. I did not attempt to connect the unit via the ethernet interface on the back of the unit. You start by selecting how many times you want a pump to dose in a single day. Then you select how many days between program cycles you would like the doser to skip (weird concept but it may be useful to some). Then you decide how many ml should be dosed for the first dose of the day. Then you select the time you would like the first dose to be administered. You answer those same two questions for however many times you selected during the first step of programming. That's it. you are done.

I calibrated each pump several times. The program has you measure out 100ml of fluid and uses that for its measurement calculations. The value is around 200 for each pump. I made sure to have the tubing full of liquid before beginning calibration as to not screw up the calibration. I used a graduated cylinder. You can use a measuring cup.

I have each pump drawing 10ml of water from its own graduated cylinder 10 times a day. That means 100ml of water should be removed from each cyinder each day. Unfortunately, that's not the case. around 120ml of water on average has been drawn by each pump. Even being perfectly calibrated, the pumps are drawing 20% more fluid than they are supposed to. I do not have the cylinders covered but i do not believe evaporation is playing a significant role.

What does this really mean? I know the pumps are not accurate. But they are at least consistently drawing more than they are supposed to. This means no wild swings and more consistent levels of dosing than manually dropping in a specific amount once each day.

I have three options: dilute the mixture i pump into the tank by 20%, intentionally under-calibrate the pump by 20%, or program the pump to purposely draw less fluid. While a pain, I think I will have to calibrate each pump again and monitor that the correct amount is being dosed.

Is the pump worth the money? I say yes. It's issues can be remedied fairly easily but do need to be monitored on initial start up. After than, it should be smooth sailing. The extra 2 hours of time time saved me $150.

Verdict: Get one!

Celso Suguimoto escreveu:A avaliação mais detalhada que já vi sobre essa dosadora foi na reefcentral

http://www.reefcentral.com/forums/showt ... ?t=2450275

I wanted to give the impressions i have had over the last week of using the DP-4 dosing pump by Jebao.

Check it out here: https://www.reefbreeders.com/shop/je...4-dosing-pump/

Ill start of by saying that the doser is cheap. I mean really cheap. I got mine for around $100 at a local shop. The price for the unit is significantly less than other competitors units. With a price that low, you should expect there do be a quality difference; but is the difference big enough to warrant purchasing a more expensive pump?

The user interface is pretty easy to get the hang of. You can manually dose each pump individually, calibrate each pump individually, and program each pump individually. The unit does not lose your settings in the event of a power failure.

The user manual is horrible. It provides little direction and barely even makes sense. Don't even read it. Search online for alternative user manuals.

Programming the module takes a little time using the display and arrow/enter buttons. I did not attempt to connect the unit via the ethernet interface on the back of the unit. You start by selecting how many times you want a pump to dose in a single day. Then you select how many days between program cycles you would like the doser to skip (weird concept but it may be useful to some). Then you decide how many ml should be dosed for the first dose of the day. Then you select the time you would like the first dose to be administered. You answer those same two questions for however many times you selected during the first step of programming. That's it. you are done.

I calibrated each pump several times. The program has you measure out 100ml of fluid and uses that for its measurement calculations. The value is around 200 for each pump. I made sure to have the tubing full of liquid before beginning calibration as to not screw up the calibration. I used a graduated cylinder. You can use a measuring cup.

I have each pump drawing 10ml of water from its own graduated cylinder 10 times a day. That means 100ml of water should be removed from each cyinder each day. Unfortunately, that's not the case. around 120ml of water on average has been drawn by each pump. Even being perfectly calibrated, the pumps are drawing 20% more fluid than they are supposed to. I do not have the cylinders covered but i do not believe evaporation is playing a significant role.

What does this really mean? I know the pumps are not accurate. But they are at least consistently drawing more than they are supposed to. This means no wild swings and more consistent levels of dosing than manually dropping in a specific amount once each day.

I have three options: dilute the mixture i pump into the tank by 20%, intentionally under-calibrate the pump by 20%, or program the pump to purposely draw less fluid. While a pain, I think I will have to calibrate each pump again and monitor that the correct amount is being dosed.

Is the pump worth the money? I say yes. It's issues can be remedied fairly easily but do need to be monitored on initial start up. After than, it should be smooth sailing. The extra 2 hours of time time saved me $150.

Verdict: Get one!

Custo beneficio dela assim como das bombas da marca é bom... a durabilidade é sempre a duvida. Não dá pra exigir. Dosadoras são dispositivos mecânicos e dentro delas vai uma mangueira de silicone que com o tempo se desgasta, não sei como o pessoal que tem dosadoras gringas faz... a minha é nacional mas individual