Alright so today I noticed that both of my betta tanks are getting that annoying little film from the water not moving enough. I think I fixed the 2.5 gallon by moving the filter a little. I have read bettas generally don't like the extra movement but do you think it would be a big deal if I had the air pump going along the back wall with a airstone? So it'd be little bubbles all the way against the wall? Thoughts?