I'm starting my first salt water tank and it's hard to get straight answers from fish store owners who are trying to make a buck. A guy told me that my filter should do 10 times the gallons that the filter is rated for! All the books I read and all the guys I've talked to say twice! I have a 60 gallon tank and I bought a Rena XP3 rated at 375 and a Reef Octopus protein skimmer at 150 gallons. I plant to use about 50 pounds of live rock and I'm going to start with fish only. This has got to be enough right? Also do I really need live sand to start with or would a regular substrate be ok. It's starting to get real expensive.