- 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
Buyer Beware!! By David on 3/15/2020David wouldn't recommend this product to a friendI used Neptune products for over 10 years on several different tanks and was very pleased overall. With GHL recently announcing the release of the ION, I decided to switch over and try some of their products. I purchased the Master Doser, KH Director, Slave Doser and pre-ordered the ION...in all $1,800+ dollars spent on GHL products. I ordered from a local store who placed the order and then we waited 2-3 weeks for the products to arrive! After finally receiving the products, I setup the Director/Doser precisely as laid out in GHL's 3 part video on YouTube. I ran the unit twice and the Doser fried due to a defect in how it's made. GHL refused to cover the unit under warranty and charged me $110 (plus the cost to ship the unit back) to repair the unit. Needless to say, I returned all my GHL gear and will not be purchasing from them again. If you are looking for a company who stands behind their products I would suggest looking elsewhere.
Hard to connect but great pump By Don on 12/15/2019Don would recommend this product to a friendThis pump is a nightmare to connect wirelessly, but it’s been a great pump and even doses RODI water so my salinity never varies. Been running for almost a year and only had to reconnect once, though that was a total erasing all programs and redownloading all programs. You have to do it step by step or it won’t work.
dont bother By jose on 11/28/2019jose wouldn't recommend this product to a friendi had it hate it pain in the #%%#% i cant control it on my iphone only when im home whats the point why do i need to plug it into my desktop to start the process contacted ghl about this also had no instructions they told me i had to downlaod the ghl app also that there are videos on how to install it on you tube serious a $500 doser no instructions dont waste your money get the neptune dos virtually plug and play and there customer support is much more helpful than ghl
Total Failure By Jacob on 11/1/2019Jacob wouldn't recommend this product to a friendI wanted to like and use this product and the slave so bad. I spent $900 on them. It looked like the clear winner as far as precision and dependability. Unfortunately it seems to be an engineered product with zero attention to useability. I played computer hacker for 3 hours trying to connect it to my smartphone and desktop computer. I am young, work with tech all day, know some programming, use social media, and I was legit in disbelief when I tried to set this thing up. First of all, the user interface on the computer looks like it was built by someone who doesn't even understand email read a "how to make a computer program" book. Think MS-DOS menu/ Oregon trail. I was Like what a joke. This thing has USB, Ethernet, and Wi-Fi capability, and none of the three are plug and play. It's 2019, if you sell a $500 wifi product it should connect in 5 min. When I set my smart TV up I select the wifi network and type in the password, when I pair a Bluetooth speaker with my smartphone I hit a few buttons. If a product is "controllable via your smartphone over WiFi" I should not have to find a desktop computer, plug into it with a USB cable, download drivers from a website, guess the comm connection (mine was like 52), ASSIGN AN IP ADDRESS (are you kidding?), And then have it blink at me between the "connected to network sequence" and "searching for network sequence" until I gave up. It's a no.
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.
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.