Alleviating Oxygen level

Hello everyone,

The feathers on my two axolotls gills have shrunk considerably in the past few months. After going through a laundry list of possible causes for this, I've finally narrowed it down; there's too much air flow in the tank. All the water levels and conditions are fine, so it must be the only solution, correct?

I have a fluval 206 filter, in a 40 gallon long tank, with several live plants. I ordered some more tubing in order to place the output of the filter as low as possible in the tank. I've also placed the output behind several objects in the corner of the tank as to further disperse the water flow so it doesn't agitate things any further.

I've looked extensively for a spray bar online, but have had little luck

I know others here have experienced the same problem, but considering my conditions does anybody have any other suggestions to solve the issue? They are eating normally and seem playful/active as always...their gills just look small and weak due to the excess of oxygen.

I greatly appreciate your input! Thank you everyone.

I really doubt that you have an excess oxygen level. Water can only absorb a certain amount of gas and no more. Also, I think good aeration is a good, desirable thing in an aquarium. If the animals are healthy, just enjoy!

Didn't you post about this somewhere else? Maybe I'm mistaken. Anyways, like Jennewt said, it doesn't have anything to do with oxygen levels. It may be something to do with water quality. What are your water parameters, exactly? And how cold does your water usually get?