Due neglect and mismanagement, the coolant in my lathe finally went
bad after several months in the sump. I have to add here that I have
all ingredients for setting up both the skimmer, as well as aerator,
to run on two timers, something that I plan on doing soon. But as of
now, I want to make sure that I properly remove old coolant.

As far as I understand, I should try to really get rid of the harmful
bacterias that live in the present coolant. I have a easy to use water
pump that I can use for this purpose.

So my plan was, pump out the coolant, rince the sump a couple of times
with just hot water with some Simple Green, then put water with bleach
for an hour, and rinse some more. Would that seem to be a good plan?

i