How long can you recirculate a dialyzer not connected to dialysate ports with no danger of bacterial growth in fluid? If blood pump is turned off, how long is the setup safe to use? This is referring to non reuse. If anyone knows and has a resource to quote, please reply. Thanks very much!

Try reading the insert that is in a case of dialyser ther is some info on preptime. And as for the set up being stangnat keeping the blood pump moving help keep air bubble forming on the side of tubing(in my experience)