Hi, I have a 400 litre freshwater tank which I am currently running an external filter and air stone. I will be replacing the air stone with a powerhead for increased circulation.
I have two questions:
1. Should I connect the venturi tube?
2. Which direction should I position the air flow?
Many thanks
Lee
I have two questions:
1. Should I connect the venturi tube?
2. Which direction should I position the air flow?
Many thanks
Lee