Help with CS102DX. Video attached.

[AW2EOD]

Finished filling tank today and started everything up.

The CS102DX is filling, draining, gurgling and filling again.

I have no idea what's going on.

Video below:

 

[ShakeyGizzard]

You need a gate valve on your drain, the water drops when a full siphon starts. I added a gate valve to cut out the air turbulence in my drain and filter roller

 

[twentyleagues]

Finished filling tank today and started everything up.

The CS102DX is filling, draining, gurgling and filling again.

I have no idea what's going on.

Video below:

Its flushing. It looks like that is set up as a dual durso drain. You will need to figure out flow out of the return pump probably decrease flow until that stops and water level in the overflow stay steady. Dursos will get a bit of noise more than the full siphon herbie or beananimal styles.

You can change that to be a herbie style of overflow. You will need a gate valve on the full siphon like @ShakeyGizzard said to "tune" it. The other pipe would need to be taller to act as the emergency drain should something clog the siphon. The siphon would need 2-3" minimum of water above it, the emergency would stay dry with water just below the opening. So either cut the siphon shorter or extend the other to become the emergency drain.

 

[AW2EOD]

Thank you both, for the replies.

I have ball valves on each line and with a little bit of trial and error, I finally tuned everything a few days ago and it's been running fine since.