I have an old uv sterilizer just sitting around because I need a new pump for it. I was wondering what would be best. It has a max flow rating of 700 gph, but should I shoot for a little less than that to increase contact time with the burning rays of the uv light?? Or can I just get a 700 gph pump. The pump will have a little head loss due to 90 degree turns, so overall flow will be a little less that 700, but I am thinking the more contact time the water has within the chamber the better. yeah or nay??