Review on 🐠 Hygger Aquarium Dosing Pump - Advanced Programmable Auto Titration Pump for Marine Coral Tanks with 4 Channel Dosing Heads and 8 Titration Long Hoses by Brenda Thompson

After calibrating it's pretty accurate, the only major issue I have is that it doesn't completely seal the dosing tube in the pump head. either pump into a tank/sump or dump back into a tank for whatever elements you are metering. That being said the accuracy will vary a bit so I wouldn't use it for anything critical and I would only use it for pumping uphill because in my opinion underdosing is better than overdosing.