Ok so I've started to sum up a lot of what I need, however the protein skimmer is still making me worried as to what size I need (people have been speaking of a skimmer that can handle 3-4x the volume of the tank) I have gone through the thread in the article "Whcih protein skimmer do you have? and would you recommend it however I am STILL worried. The recommendations are on the skimmers themselves (I know that the manufacturers can tend to exaggerate there skimmers capacities). So its a 100G Octo tank and the skimmer is a "Octopus Core + Pentair 1500i", it is an In-sump skimmer. its retail recommendations are as follows... Max Tank Size: 1500 L Air Intake: 3000 L/H Pump Power: PENTAIR 3000 55w Please if anyone has used "reefoctopus" products before tell me what yours is like, however I am worried that this skimmer is to small for the tank its going to be used on any hints please ?