Neptune Systems Temperature Probe Hydrometer it can make an ideal

it can make an ideal substrate environment

It’ll last you ages (130 tests) and the test bottles come with child safety caps so you don’t need to worry if your curious kids accidentally get their hands on them

1x Blade Tank Rest Mounting Solution

Brstlworms

Neptune Systems Temperature Probe Hydrometer it can make an idealReplace your Temperature Probe, add one for another tank, or put one on your PM2 PM3 module for temperature compensated readings. Buy this probe if you are: Replacing an old probe. Adding another tank to your system via a PM1. Want to have more accurate readings on your PM2 PM3 modules by adding temperature compensation.