Hi all, I am currently keeping 2ft IOS tank and I am upgrading to a bigger tank with sump. I would like to keep SPS or mixed reef. A few questions that I have 1) To keep SPS, do I have to follow certain system such as zeovit/fauna marine system? 2) How do you keep your nutrients low? (Using Rowaphos/Algae Scrubber?) 3) How often do you water change for a big tank? I am currently doing weekly water change for my IOS tank 4) Any tips for keeping SPS/mixed reef? Thanks! Sent from Singapore Reef Club mobile app