Hanna Marine Ammonia Checker HI784

This Hanna Marine Ammonia Checker HI784 is a fantastic tool for maintaining a healthy marine aquarium. It's incredibly easy to use, providing accurate and reliable ammonia readings in seconds. Monitoring ammonia levels is crucial for fish health, and this checker makes it simple to keep a close eye on water quality. Highly recommended for any serious saltwater aquarist!

Works as expected.

Great checker. Just wish the packets were easier to pour.

love this product!!!all i can say is read the instructions and follow them exactly to the second! the tests will fail without percision. Trust me, after the 15 minute result wait time, along with the pricy reagent packs, you want exactness.

Love it's good giving a accurate number the no chart with it like my API kit but I just looked the reading was good for a new tank cycling is finished.

PROs.If you have trouble reading those color charts this is a good option. Easy to use.CONSHanna reagent refill packs are IMHO ridiculously expensive for a few grains of powder.

Wish I could give this zero stars. Hanna decided to make this device with 1 single button and auto shut off which was criminally stupid. First you add regent A, regent B, then water, and then you put the cuvette into the device to zero it out. That part works fine. Then you add regent C to the cuvette and put it back in the device & press & hold the button to start the 15 minute count down. The problem is holding the button also shuts off the device or resets it. So 9 times out of 10 the 15 minute countdown never starts & you’ve now reset the device back to step 1. Problem is you can’t zero it out now because you already added regent C. So now you have to start all over and waste more regent. Alternatively you can just wait 15 minutes & press the button instead of doing the countdown on the device. Problem is it has a 20 minute auto shut off so if you’re not fast enough with adding Regent C, you risk the device turning off before you ever get to press the button. WHY NOT JUST ADD A 2ND BUTTON? Or get rid of the auto shut off. Having a button be multi-function on a device that requires extreme precision & uses expensive regents is just dumb. The kit comes with enough regents for 10 tests but I’ve easily wasted more than half of those due to the device resetting itself or shutting off. I’m so annoyed I bothered with this. Should have just stuck with the color tests.

Came in looking used and moldy replacement is supposedly being sent hopefully it's better