Step 2Materials and tools
1. inline water filter housing (CO2 mixer) see my previous instructable http://www.instructables.com/id/CO2-mixer-for-planted-aquarium/
2. external thermostat with external sensor and heater (mine was with water level sensor so I had to slightly change it)
3. glass heater with built in thermostat (in fact these days is hard to find ordinary one without thermostat)
4. silicone sealant
5. Drill with bits
scissors, screwdrivers, etc...
Hint:
In my setup I've replaced mains plug by one with switch built in. I recommend switch off heater before you'll start digging inside aquarium. Don't cut the corners, it might be dangerous.
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