Is this normal?

[Charmaine]

I am cycling my tank and I think my filter makes too many bubbles (micro bubbles). Any advice?

 

[splattered]

Looks like it's sucking air somewhere. Tighten everything up on the whole system you'll find it

 

[splattered]

Sometimes evaporation causes it. I actually drilled a hole in my return to get that effect. Some fish like oxygen like that especially native rheophile species

 

[Charmaine]

So that won't hurt fish when I get some?

 

[splattered]

Some like it more than others but as long as it's just air (not gas) it's fine

 

[Charmaine]

Thank you so much. I have been cycling for more than a month and I want to get some fish tomorrow. I have taken the filter apart and cleaned it, but it still make those bubbles and yes it is air.