Fluval u1 earation broken cant fix

[Spyko]

I have a fluval u1 in one of my axolotl tanks and the earation wasnt working on it for the past few days despite it working for 2 months prior nothing i do fixes it. any ideas on why and should i just lift the filter so the nozzle is not underwater wich creates heavy bubbles

 

[Hayleyy]

I'm not familiar with this model, is that the output which is not working properly? What is the issue with it? If it's just a part that is broken you might be able to get replacement bits from your local fish store. If the output is creating too much water movement you can tie a bit of sponge on the end.
Since it is an internal filter I would replace the whole thing with a hang on back, or canister, filter. Internal filters often raise the temperature of the tank because the pump generates heat.