Coralife Aquarium Fish Tank Deep Six Hydrometer For Measuring Water Salinity PPT and Specific Gravity
$ 4.93
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.
