IM EXT 100 overflow help

[jordan23]

Hey Everyone, long story short.. I’ve had my Ext 100 up for a little over 2 weeks now. I have been banging my head against the wall to try and tune the overflow. This is my first sump tank so there’s been a learning curve. My issue is, I cannot get the overflow level to stay constant. I’ll get the water just below the middle pipe and then I’ll come back 2 hours later and it’ll be siphoning down that pipe or it’ll have dropped 3 inches and be pretty loud. I bought the reef ready version so it came with all of their plumbing and return pump. I have the pump running on level 3. I also have two Nero 5 wave makers that
I’m starting to wonder if they could be causing it. Any suggestions would be very appreciative. I’m starting to lose my mind with it.

 

[jordan23]

 

[fishface NJ]

Are you using an AC or DC pump?

 

[jordan23]

Are you using an AC or DC pump?

It’s the one that came with the tank . Might jet xl. On the third setting

 

[jordan23]