Hey guys, I am looking to give a 3g saltwater picotope a shot. I ordered the Tom Deco 3g aquarium, dKH buffer, a hydrometer, heater and thermometer. I plan on doing 3-4 lbs. of live rock, 3-4 lbs of caribsea live sand, some polyps, snails and if things get stable enough a clown goby. I plan on just buying premixed saltwater from a local shop and doing 1g weekly changes. My questions are 1) How much flow is too much for a 3 gallon (I don't plan on attempting more than mushrooms/polyps)? and 2) What is the best local shop with reliable pre mix, and quality live rock (only buying 3-4 lbs.)? Thanks in advance