Im not sure if it is good or bad for bass. I have read about the product and most of things it does will be beneficial to bass. However there are two things it does taht I am unsure of, one is "Keeps Bait Frisky" and the other is "Hardens Scales"
I thinik it depends on how the product keeps bait frisky in order to know if this is going to be good or bad for bass. And the same goes for the hardening of the scales. How this is done I believe will also determine its affect on a bass.
There is no way you can stick a hose in your live wells, plug the live wells, fill em up and then let them drain. Maybe do that a couple times. If there is any sort of coating on the livewell walls from the Shad Keeper, get a clean cloth and rub the walls down as the livewell is fill and/or draining.
I think if you rinse your livewells a time or two and then use a good livewell additive for the bass when ya put those in it next, you should be good to go.