I think I might be the one that likes the higher turnover,actually it all depends on why the high flow or the low flow,I could tell you why the high in my case.
1st its at low end 7000glns/hr turnover that is about 17 times (as my main display at roughly 400glns)
Running that in conjunction with 2 X Jebao WP60 one on either side to give me waves of almost 2" high from top to bottom of the tank with the turnover outlet location near one and enhances the flow throughout the tank leaving no room for dead spot in any section of my tank.
I run 2 frag tanks and 3 sumps that are all fed and split at different flow rate directly from my overflow box (so to say one pump runs flow throughout my entire system) that gives me dwelling time for each tank and sumps (one sump 5 foot loaded with rubble and act as criptic) another strictly for my carbon and skimmer, one that holds the water and removes all the crud from the water line and the last for filter floss that runs 24hr prior to water changes and back to the main tank.
Call me old school or crazy but it worked for me in years with no issues and I believe if it isn't broke why fix it.
Another belief of mine is that everyones main tank is loaded with fish, fish poop, mixed corals,coral slime and all types of bacteria and to top things high lighting to promote growth in all aspect why leave the water on low turnover when you can keep it cleaner with other means through the sump.(skimmer,carbon,floss,maybe GFO,socks,...)
I have seen tanks with low turnover maybe 5-7 times with more problems than not.
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