Building a new 29G Reef Tank. Pic is next day after running the filter to clear the cloudiness from the sand. I used a mix of dry reef rock and dry CaribSea life rock, 20lbs sand and 21.5G of water mixed accordingly with Instant Ocean for Marine aquarium. Sand used was CaribSea Arag-Alive (Fiji Pink); I pre rinsed one of the 10 pound bags but not the other. Cloudiness cleared by the next morning after running an influx bay filter overnight. The filter has carbon pellets, bio balls, and three different filter pads (yellow, black, blue), plus has a wave maker included so there is a good current and circulation of water. I added the two packets of bio magnifier that came included with the sand (one pack per 10# bag) when mixing the water. There is still some scum and haze left but not much. I will be adding nitrifying bacteria in the next few days after the haze has cleared sufficiently and I can turn the filter off to allow the bacteria to set up. No lights running yet of course, hopefully I won't need a complete dark stage and have to cover the tank. I will run a skimmer for a day or so to get the frothy gunk cleared and may agitate the sand and wipe the inside of the tank walls to get all the haze cleared. Will update soon with progress.