yep, you got me on that one, O2 saturation didn't even cross my mind cause i was thinking containment areas such as traps
or maybe im lieing & my knowledge is slipping..lol
Rb you say no dividers, do you actually mean dividers or you referring to baffles?
Id suggest a quick trip to the hardware store & pick up a piece of acrylic or glass to run down the inside of your
sump.
Silicon a "T" base for weight , actually it will look like an upside down T, but you get the idea. That way is movable, custom & let me guess...movable.lol Maybe silicon two pieces to the base to give it propper weight.
Just angle the end that faces the return pump abit toward the side walls so you create a bottle neck & you'll find the speed or flow will quicken through this section.
I would then quickly throw together an egg create table top of sorts, basicly a cube without a front & back wall for your probe tub to sit in, Cut a section big enough in the top for your beaker, thats where holes drilled at the top of you beaker come in handy- allows you to zip tie it to the egg create stand, & place the box into your narrowing section & you'll find it will never move.
beauty is with this, is the cost is next to nicks, cause chances are you have spare material around the place, or $15 at the hardware store creates a long term cheap solution, ironic considering whats feeding it..lol
hope that helps.
