- Doser 2.1 SA 4 Pump Master (Black Body) - GHL
Simple & Smart Dosing
The GHL 2.1 Dosing System could be one of the easiest dosing systems to set up and run. Not to mention that it has cloud connection with the free myGHL service, you can access and control your doser from anywhere in the world. Operate the 2.1 Doser from your phone, computer, tablet, or any other device that can connect to the internet. The built-in WiFi lets you connect to your home's router without any additional cables, but also has provisions for LAN or USB connections. The 4 head dosing system is perfect for reef tanks that use methods like Triton, KZ, or Aquaforest that require more than the primary three additives.
GHL pump programming is super simple, just pull up the GHL Connect or myGHL Cloud App and then you can calibrate each pump separately, prime each pump, and also program the daily dosing schedule within minutes. You can select which days of the week you want to dose, along with how many doses you want per day and how much to dose per session.
The GHL software is more than just a dosing pump interface; it can monitor how much solution has been dosed and by inputting your containers starting volume, know when additives need to be replenished. With additional accessories, you can unlock features like auto water changes, provisions for magnetic stirrers, and even an ATO functions. GHL has even gone a step further making their illuminated logo on top of the dosing unit change colors as status transitions, letting you know when something needs attention at a glance.
Need more than 4 pumps? Add a GHL 2.1 Slave Doser to add another 4 additional pump heads that can be controlled through a single interface. The slave doser will need to be connected to the master via a PAB cable (purchased separately). The additional heads can help keep your reef tank much more stable by automating other additives that would typically be dosed by hand.
Powerful & Precise Flow
Having speed control of the dosing head is critical for some additives like alkalinity solutions that can easily precipitate if added to saltwater too quickly. The variable flow rate dosing heads can push anywhere from 8-45 mL per minute and can be programmed through the GHL control software allowing you to dose solutions under accurately under half of a milliliter. The rate of flow can vary depending on the length of tubing and head height required. The max distance the GHL 2.1 SA Doser can push or pull liquids is 50 feet of total length allowing you to put the dosing where you want it, and then route the tubing to your vessels and sump.
1x 2.1 Dosing Unit (black body)
1x 24V Power Supply
8x Plastic Tube Adapter
6ft USB Cable
Dosing tubing not included - we suggest using Drew's Doser Extension Tubing
Download the GHL Connect App
Easy to use By David on 3/8/2019David would recommend this product to a friendIf you’re on the fence about this dosing pump and have the money its amazing! It was easy to connect with the GHL app and makes dosing adjustments a breeze. I have it dosing Aquaforest and my Kalkwasser without any issues. Definitely worth the investment.
It works flawlessly By Tim on 10/7/2018Tim would recommend this product to a friendI previously used a cheaper doser, which was not dependable and difficult to program (on the device). This 2.1 doser is in a different league. It delivers precise doses spread out evenly during the 24 hour day. The dosing schedule is very flexible. The quality is top notch. Also, The GHL Control Center works great once you get it set up. I have it set up to connect via USB and WiFi and the USB connection software on my PC is much better than the WiFi version. It's more complete and much quicker. I would recommend this doser to anyone who wants a stand alone device. Also, FYI, I dose Core7 and Vinegar.
after getting 2, still couldnt connect By alex on 10/1/2018alex wouldn't recommend this product to a friendthe first one I got wouldn't connect. BRS customer service was prompt and had me return it to evaluate it. they found it defective and sent me another one. the second one I got still wouldn't connect. there is no instructions on how to connect included. you have to search it out on the internet. even then the "wifi" that's built in never works. every time you want to make a change you have to exit app and try again to connect.
Best doser in the hobby By Mick on 8/20/2018Mick would recommend this product to a friendWhat can I say? This pump feels like real quality. Found the app really easy to use, and I like the features for calibration, dosing speed, daily dose, and it even lets you know when it's nearing time to refill the reservoirs. Hard to beat the price on a quality 4 head doser too.
Reliable Doser By Joseph on 6/29/2018Joseph would recommend this product to a friendVery accurate and reliable pump it’s programmed. It’s easy to set up the dosing function. My only complaint is it’s a nightmare to connect to the internet wirelessly. Customer Support is similar to Neptune via Email which is a very slow and irritating process.
interface is kludgy - doesn't dose accurately By Mike on 6/3/2018Mike wouldn't recommend this product to a friendI had the exact same experience as previous reviewer. Couldnt get it to calibrate and dose with repeated precision. App was total crap. I thought I would save a couple of dollars by getting this instead of two DOS for my Apex. Big mistake.
Difficult By Kyle on 5/11/2018Kyle wouldn't recommend this product to a friendIt’s a wonderful product if you believe the advertising but the truth is it is way too difficult to program… And after several attempts at calibrating the pump, it is still dozing off by 2ml which is more than enough to destroy every coral in your tank with some additives... to summit up the programming is clunky and the pump is unreliable
Great quality product By Jpas on 4/19/2018Jpas would recommend this product to a friendI have had the 2.1 for over 1.5 years and it has been a great product. The app is not the best, but once you use it for a few minutes it becomes pretty intuitive.
Silent and effective By James on 3/11/2018James would recommend this product to a friendSuper silent, very precise dosing, I'm using for Core7 hourly and Acropower daily. I did end up eliminating air bubbles by putting silicone all over the connections and I wasn't able to find a good adapter to hard-line mirlok from the dosing heads, but this is probably a simple challenge to overcome when I decide to rework my lines.
Great hardware, app needs update! By PhilW211 on 3/8/2018PhilW211 wouldn't recommend this product to a friendThe doser is great but the app running the doser is horrible! It constantly has connection issues and crashes every time I use it. I don't think it's been updated since I bought the doser 2 years ago. Yeah, it works but super unstable. Not something I'd expect after spending $400+ on a doser that is supposed to be top of the line.
What total pain. By John on 3/8/2018John wouldn't recommend this product to a friendI thought this would make things easier than the BRS dosers. I really considered the Apex DOS since I have an Apex, but it seemed this was a better deal. What was I thinking. The setup was a pain. It does not work under iOS at all - or at least I couldn't see how to make it work. Setting the dose amounts was convoluted and changing it even more so. I think I will check out my buddy's DOS and then see if I return this or not.
GHL = Reliability By Alex on 2/6/2018Alex would recommend this product to a friendWhen it comes to adding chemicals to your reef I firmly believe quality of the doser reigns supreme. The GHL 2.1 is praised all over reef forums for its stability and reliability. Super simple to set up and the app is fantastic. Control from wherever in the world is a major plus. To top it all off this unit is sharp! I have mine dosing Core7, happy I spent a little extra to not have to worry.
Can this be positioned on its side in the sump vertically?
Since this is a peristaltic pump there should be no issues with orienting it vertically rather than horizontally.