External Aquarium Filters

The Hydor Flo 360° wave maker/deflector is attached to Eheim Ecco 2236 filter output in my planted aquarium. The head rotates slowly 360° using the water flow from the filter, and provides good water circulation in the aquarium. My fish seem to love it as they will sometimes swim against the current for fun! Yes, the bubbles you see are from the DIY CO2 which will show in a different video