Aqua One Glass Thermometer
Plain and simple but accurate and easy to read. Its hard to beat the Aqua One Internal thermometer for value. Comes complete with sucker so you can attach it in your aquarium where it will be easy to see and read.
Aqua One Marine Hydrometer & Thermometer
An easy to and extremely accurate that also has a decent thermometer built in. A clear view green segment aids determination of the correct values. The hydrometer is weighted to make sure it always floats at the correct angle for testing.
Aqua One Pipe Brush Set - (pack of 3)
An essential to keep your Aqua One setup running well, this handy set includes 3 brushes especially designed to clean all Aqua One pipe sizes. All 3 brushes rinse clean in seconds.