Well..... I couldnt leave well enough alone.

I drilled some small holes in the top and plugged the main, big hole the tubing went thru with some quilt batting so they would slip out that hole. Now they arent moving as much as they were before even I move the stone almost all the way to the bottom.
So I was thinking, do you think if I were to cut down the overall length of the tube that it would create more flow through the tube? I have the air as high as it can go and they are just barely bouncing in there so, gonna leave it for now so I dont end up loosing any but once they are in the breeder Im thinking of cutting the entire tube down a little and trying that. Does anyone think that it will decrease the flow rate through it or am I right in thinking that it will increase it?
Thanks in advance.
Just using these fry as a "practice run" more or less till my Demasoni Fry are ready to go in there so wanna get it all set for them.