HOB only run at night.

[ricardo48]

Hi.

I have two filters on my Aquarium, an external hob and an internal one.


The internal one is on for 24 hours a day but I only run the HOB for 12 hours at night to help gas off excess CO2 and to stop surface agitation during the day when im injecting CO2

Is this ok???


As when the filters goes off the water drains out off it leavin an empty filter area with all the filter media not in water.

Will this kill the bacteria if they are not in water 24 hours a day?


Any information would be fantastic.