There are many paths to success. Some people have had massive success with HOB or all in one IOS tanks. But, if you were to ask me - having done both of those before for many years - I would always go with a sump option if I could. Simply because new equipment comes along and a sump just gives more space and more water volume so any mistake is diluted. Note. There are some amazing tanks for sale here on the forum all ready to go. But as with all things it depends on budget and space availability Good luck Sent from Singapore Reef Club mobile app