Coralife Aquarium Fish Tank Deep Six Hydrometer For Measuring Water Salinity PPT and Specific Gravity

Worked good!

I compared this with my LFS digital tester and it is Accurate. Right out of the package it is not accurate but follow the directions and season as instructed and you will have an accurate budget tester.

Easy to use and seems to work. Whether or not its really accurate is unknown to me as im not familiar with salt water. Im using it for trying to create water conditions for amano zoes. Some things to know when using this is that the instructions say you should let it sit with salt water for 24hrs before doing the actual test. Also once its ready for testing you should kind of smack the bottom to the floor somewhere soft not hard. Learned it off youtube and it seems to get the dial to move properly otherwise the dial just shoots straight up.

I have been using the digital meter for the longest time. The coral were thieving. One day, out of the blue, I wanted something to test against the this reader since this reader has no calibration and has been a couple months of using it. The result of this hygrometer was so high, it freaks me out and I started to dilute the water based on this reading. Next day, a couple of my corals died. i went to the aquarium store and ask them to give me some of their water that they tested using the Hanna tester. The water sample is at 1.026g from the Hanna checker. This Hydrometer reads 1.032. My digital meter is a bit off, but not off as much as this stupid thing. 1.026 is about 35ppt, so my is off by about 1ppt, which is like .001g.I have shake the bubbles off, measure at room temperature, measure a few times, all came out with the same result, 1.032g.In summary, I don't know if I gotten a defective one or something else. Made me very mad and sad for trusting this unit and not trust on my own instinct that the Corals are doing fine and I should leave them alone. Hope the rest of the corals survive this and take it as a lesson learn for using cheap instrument.

works great for a first time saltwater fish tank owner

These are pretty accurate if you need to take a quick ballpark measurement and don't have the time to work a more precise device.You ABSOLUTELY need to "season the needle" by soaking it in 35ppt salinity water. Before I seasoned it, the needle showed 1ppt higher reading, which is probably why some people think it's inaccurate.The scale marking are excellent, actually and they even put in a bubble remover on the intake.

The Coralife Aquarium Fish Tank Deep Six Hydrometer is an affordable option for measuring salinity, but it's definitely a "you get what you pay for" kind of deal. While it’s easy to read and designed for temperature-corrected readings, I found it inconsistent—sometimes giving me two different measurements back-to-back. You also have to tap it on a hard surface to get a more accurate reading, which isn’t ideal. Plus, dipping it in the tank means dripping water all over the place. For a budget tool, it does the job, but I’ve since upgraded to a refractometer, which is much more accurate and hassle-free. If you're serious about precise readings, it's worth spending a bit more.

I’ve used pretty much all of the options for testing specific gravity including expensive refractometers. besides the high cost, Those have to be calibrated often and are a pain to use.The floating swing arm coralife hydrometers never have to be calibrated. Season it with saltwater for the first 24 hours and then rinse in freshwater after each use and you will have years of testing without any hassle. I’ve tested them against refractometers are they are accurate +-0.001. Stability is much more important than having perfect accuracy anyways as we know.

The best 20 I've spent

Got this thinks it would be perfect for my brackish tank and they didn't even send the one in the photo and the one they sent dosnt even read well would not recommend

No es la modelo que se ve en la imagen y la medición no es precisa mejor un refractometro y evitar gastar en estos que son poco confiables

Its a great product

No viene bien calibrado, no es confiable la lectura de la salinidad, 1023 reales me da 1032 en el densimetro