Well I got about 75lbs or so of sand in and about 75lbs of LR in. I noticed the tank had a white film like over everything underwater before I put the sand in rock in, but it easily wiped off. Here's a pic, the tank is incredibly cloudy. It was beginning to clear up before I put the sand and rock in. I have another 75lbs of LR sitting in the garage underwater with a powerhead running.
Here's a pic from my iPhone.