watched Sanjay Joshi's video on the youtubes recently and He and Jake Adams were talking about turn over volume in the sump. I believe Sanjay was between 4-5 times his tank volume. Wanted to know everyone's school of thought on how many times their tank volume do you flow per hour. Especially with the Triton method hitting the scene and requiring more than 10 times tank volume circulation. Me I'm about 6 times turn over for my 150g as I think too much turnover doesn't allow efficient contact time with the skimmer. What's everyone else's thoughts and turnover rates? Let's keep this solely on turnover to the sump and not in tank flow rates as that's a different topic.