Here is mine.
The 1st on the left is for CO2. 2nd timer on the right is on for 2 hrs after mid-night to run the air pump and small power head in the sump.
The power head together with the air stone is on the left back
A duck mouth nozzle is used to direct the flow to dead spot
When I do WC, I will shut off the valve on the return and power off the pump. I don't like the return sucking water down from the main tank as I have frogbits and they will get sucked down also. When done, it is the reverse, power on the pump and open the valve.
I actually can don't use air stone to break the water surface but attach the venturi connector and let the power head do the bubbling. Using it since I have an air pump unused. Just my humble set up for a 3 feet planted.
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