Super new to the whole salt water aquarium. A few of my friends have salt water tanks but i'm still wondering when the best time is to do a water change..? Also what percentage of water should be changed. The tank is a 29 gallon Bio Cube. I'm not exactly sure how many pounds of live rock I have in it. If I had to guess would say a little more than 10lbs. I have 2 clown fish, a goby, 2 sea urchins, some crabs, star fish, and some snails. I'm sure this question sounds rediculous but I thought I would throw it out there.:mrgreen: Thanks