I've seen a lot of negative reviews about this product. I've seen where people have had issues with the app, wifi setup, dosing pump setup, and calibration. I have just returned from the DP-4 Jebao dispenser and am very happy with this dispenser. Easy setup, Wi-Fi was easy to set up, calibration was easier than a dp-4, and setting up a schedule was a lot easier than standing and looking at each box to determine the dosage of two parts, magnesium and vodka, to adjust. it was so easy and for the price i hope it will last longer than the dp-4. The 2nd pump dp-4 lets the 1st pump work when activated. I'm pretty sure it's moisture on the circuit board causing both pumps to turn on at the same time. The old dispenser still works with the 1st, 3rd and 4th pumps so I'm sure I can use it as a backup for something else. Overall, I highly recommend this dosing pump. Time will tell how long this will take, but for ease of use, this is definitely the way to go. Happy reefing!
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