OK I have a coarlife 18W uv sterilizer on my 95 gal tank. It is plumbed into one of the two return lines I have. My question is the manufacturer recomends a certain gph flow rate to kill algea or disease i.e. 240gph for algea. Should I install a flow meter on that return line or would that mess things up? I have a corallife 1080gph external pump. I can control the flow rate through a ball valve I have on each retrun line. Thanks for the help. I was told by my LFS that flow rate and uv sterilizers does not matter.