Wow. I AM surprised. What do you think about the clam theory?You might be surprised.
JDA did an experiment showing that 5 pounds of fresh rock in 5 gallons of water could absorb more than 50 ppm of phosphate before the levels got to 0.2 ppm.
I was chatting with @mcarroll the other day about phosphate binding to aragonite. I have seen many instances where phosphate bound live rock and sand requires massive amounts of media and water changes to remove all of the phosphate. Two instances: 1). Local purchased 120lbs of Pukani live...www.reef2reef.com
"Total: 57.4 ppm in water column to .1748 ppm after aragonite was introduced."