I have a question an I am afraid that it is a stupid question but here goes- I bought my tank and equipment used- the filter is a penguin I believe. Anyways the thing that hangs down long in the water has a piece about half way up with vents, you can either open or close this part. What is it for and should it be open or closed.
Thanks for all your help, I feel kinda silly but I would feel worse if it was something that i am suppose to be doing and dont .
Thanks
Granny
Thanks for all your help, I feel kinda silly but I would feel worse if it was something that i am suppose to be doing and dont .
Thanks
Granny