Heat Shield Fan Cover cloning-&-seed-starting and double junction pH electrode

and double junction pH electrode with

Elemental contains two absolutely essential macronutrients: calcium

Use it instead of a box full of pluggable relays

or even open it to check on things or add ingredients

Heat Shield Fan Cover cloning-&-seed-starting and double junction pH electrodeThe Fan Heat Shield blocks the heat generated by inline duct fans from radiating off of them. This means that less heat finds it way into your room, allowing it to be better carried away by your existing ventilation system. This results in a cooler environment, increased plant growth, and more energy savings from increased A C efficiency. Fits 4", 5", and 6" inline fans