It has been several years since I had a saltwater tank, and I need to brush up on cycling a new tank. I put in live sand (20 pounds) and about 30 pounds of pre-cured live rock in my 29 gallon bio cube last week. I did a 50% water change this week. Do I keep doing a 25% water change every week for about 6 weeks until all parameters are at 0? When should I start testing the water? If anyone could point me in the right direction, I would appreciate it! Thanks! [smilie=smile.gif]