It's ALMOST up to 6.2
Here is poor Gimpy in the nurse tank, which is also the bucket I fill my tank with... It's actually a cool set up... The filter us a Whisper10 that came with my 10g tank, I removed the lower part of the intake tube. Now.. With the tube wide open, it causes for concern with telescope breeds like my Moor and the Demekins I had... so I devised a makeshift 'keep away'... Underneath the intake is an old flake food container... now... the container floats... I grabbed a 'chip clip' off the fridge and attached it to the intake tube, slide it down to connect with the food container, and there ya have it.... The tube gets water without the food container getting sucked up, and keeps the fish from getting its eyeballs suctioned off....
Now... There is a piece of plastic that I have positioned below the spout of the filter, so that it doesn't cause a disruptive current in the small tank, Gimpy needs to be able to rest...
You can also see the airstone.
... I know he has enough air because I watch his mouth as he breaths and it's just like how he breaths in the 30gal... he hardly tries at all, which is a good sign..... but he still likes to play with the bubbles.... weird fish