You might look at the post shown below.
Since the modification, we have yet to have a problem keeping bait alive.
Not saying we will never have a problem, just no problem's to date.
The only change made since the picture shown in the posting below was to add a plastic anchor to help keep the PVC pipe in the upright position.
07' 215 CC Bait Well
Hope this helps.
PS. The search feature does work on this site. That is how I found my previous post above.