Bio Cube noise

I picked up a used 29 bio cube last weekend. There is alot of noise from the water dropping from first chamber to second. Is there suppose to be bio balls or a tray to break water noise? Thanks

 

Yes but what I did was took out the bioballs modified the back a little by cutting the wall of the first chamber and completely filled the back with water in chamber 2 I have my Skimmer pump, heater, temp and Ph probe

 

I was putting my heater in it. So no tray or bio balls woud work

 

Just fill it until it doesn't make noise

 

Yes I just read online and it said to ignore the water fill line as im not using bio balls. Thanks my biggest concern was it back filling.

 

There's no real way for it to over flow

 

Thats what I thought but why is the max water fill so low?

 

Thats what I thought but why is the max water fill so low?

 

Who knows

 

Its the best way to run bio balls for clean purposes and best for oxygenation for bacteria.

 

Its my 18 month olds tank. I have it low enough so he can see it. He cant see in my 90 or 125.