40 Gallon Tank I need help with marineland 370 canister filter

Pinkclemonade74

I'm very new to all this. I have a marineland 360. But all my fish are going to top for air. Whats going on? I put my bubbler in for a few they're ok. Then without they're struggling to breathe. Please help. I have no idea what to do or anything
 

Ghelfaire

What species of fish do you have? Some fish like to hang around the top

Are their gills red?
Do you know your water parameters?
Is the tank cycled?
 

OutsideFoodBlob

Don’t panic. Your filter is doing its job but aeration isn’t always tied to filtration. If your return doesn’t create surface agitation in some way (and it may not be designed to do so), then just keep your air stones/bubblers on. Hope that makes sense.
Are there any issues with your air pump or noise or such that keep you from having air on continually in tank? That would help with recommendations too.
What species of fish do you have? Some fish like to hang around the top

Are their gills red?
Do you know your water parameters?
Is the tank cycled?
Yes, definitely check your water parameters. First line of defense when something doesn’t seem right in your tank.
 

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