Programmable Auto Dosing Pump DP-4, Black

This Doser is super awesome and for the price you cannot beat it. Do not expect anything fancy, it works, and it is accurate. It is just a couple of boards with a shell connected to dosing heads. No fancy apps or remotes you just set it and forget it. One thing to keep in mind is that if you have issues with it not keeping the schedule and time you set that you may have to replace the internal memory battery or make sure the contacts on the battery are not bent out of shape. In my experience, I set it and when I unplugged it would reset the time and schedule. I then opened it to check to see if it had a battery and it did. I checked the battery, and it was reading the proper voltage. I noticed that the contacts were barely touching, so I bent them slightly and it worked as advertised.

I was looking at expensive alternatives and finally decided to buy this one before I went on vacation. I had a nano tank that was taking about 40 ml of two-part per day, and I preferred doing it in two intervals of 20 ml in the morning and 20 ml in the evening. I did not mind hand dosing, but I did not want to have to hassle someone to come in and dose for two weeks and have to go by twice a day. The unit came in, and I quickly calibrated it and set it up to dose the 40 ml into four doses per day. I may change it to 8 later on but for now its working great. I am only using two of the four channels. I am looking to possibly set the other two channels to do small daily water changes to automate the water changing process. How it is a less expensive alternative, I am testing the amount it is releasing every month, and I have a couple of extra heads available. I may buy a second unit to have as a back up just in case.

Construction: The buttons, LCD, and pump heads seem to be of pretty high quality, though the case feels cheaply made. The power jack on the unit I received has a poor connection and the unit will lose power if the cord is angled incorrectly. This is mostly just an annoyance since the unit is secured inside the tank stand. The cord that comes with the unit also sticks straight out of the back, so although the unit itself is only roughly 6 inches deep, you need to provide an extra inch or so of clearance for the plug. Space in my stand is at a serious premium, so this wasn't an option for me. I had to buy a new AC power adapter with a 90 degree barrel plug in order to reduce the clearance in the back. Although the instructions state that the unit isn't waterproof, mine survived, so far without issue, after being sprayed with several gallons of saltwater due to a burst pipe fitting on the tank return. While I wouldn't recommend replicating my unintentional experiment, it does seem to prove that the unit is fairly durable. Use: The unit doesn't come with tubing, so you will need to pick up some airline tubing before you can get started. The instructions are poorly written in broken English and are missing words or pictures in key steps- don't bother trying to use them. Champion Lighting has a much more clear and complete version here: http://www.championlighting.com/pics/doserpics/Jebao-DP-4-Instructions.pdf Programming isn't completely intuitive, but is fairly straightforward and isn't nearly as difficult or time consuming as some reviewers make it sound. You will need to set the time and the volume of each separate dosing event on each pump, so this could get tedious if you're dosing more than a few times a day, but if you're only dosing 3-4 times a day you can easily reprogram each pump in about a minute. Once calibrated and programmed the dosage is very precise and consistent. It will retain the settings even if power is lost. When running, the pumps are pretty noisy- probably loud enough to hear over a TV at normal volume. In most applications they wouldn't be set to run for more than a few seconds so that's not likely to be a problem in most cases. However, if the tank is in a bedroom and you're a light sleeper you may want to set the unit to only dose during times when you won't be sleeping.

First, the programming is very limited. If you want to do alternating days, you have to set it to 23:59 and 00:01 daily. Since it was do-able, I wasn't too annoyed. Then I found only two out of the four pumps worked. The last two would make a strange sound but not pump the solution. The first pump would only do a few drops, so I had to take the dial off, make sure all the components were on right, and eventually found I had to loosen/unpinch the hose inside to get it working. Now after all this I was glad to have it set up and working. I followed the steps to calibrate the pumps, and purged the tubing of all air. This last part was meticulous but important to do. Over the next few days I noticed rather large air bubbles had gotten into the tubing. I checked that the connections were on tight between my solution containers and the pumps, and purged the tubing again. Again, large air bubbles. I assumed it was the tubing, that maybe there were tiny holes in it, so I went and bought new tubing. Not from the local pet store again, in case it happened again, but from a store online. Calibrated, purged the tubing, crossed my fingers. Nope! Large air bubbles! Seeing as it might be the connections to the tubing, I sealed shut all the connections with glue. Next day, air bubbles, but I noticed I missed some spots and some connections, so I did a better job of sealing. Annndd... air bubbles. The only thing I can think of is that the hose that is inside the pumps has holes in it, but would that be the case for both pumps? I'm not sure what the chances are. So, I've given up on the Jebao DP-4. The entire planted tank and aquarium community can recommend it but apparently I just don't have any luck with it.

Excelente inversión para acuarios plantados, no vuelves a dosificar manualmente. Es precisa, muy buena calidad y mantiene la programación si se va la luz. Dosifica por mililitros, defines cada cuántos días se ejecutará. No permite programar de acuerdo a los días de la semana, tienes que adaptarte. Meses utilizándola y las plantas como nunca antes. Fácilmente puedes cambiar un valor y esperar para ver resultados con precisión.

Zaskakująco skuteczne i łatwe do ustawienia. Polecam ;] Ciągnie płyn z minerałami 2 metry w górę i nawet dobrze dawkuje do akwarium!

funciona muy bien de acuerdo a las caracteristicas

todo esta como se indica en la publicación

Muy malo el producto no lo recomiendo