solitude127
Proud user of IO Salt!
Hey Mike. I have 6 of the large ones and 5 of the small ones. The small ones are about half the size of the big ones so I have about 8.5. I'm not really sure how much I need. Merritt should be able to advise you on them. These rocks are just super porous. Way more porous by weight and volume than any other live rock out there. These are like sponges. As for rotating, I would think that you would want to cook the ones that you are rotating out to remove any absorbed phosphates or organics before drying them out. That way when you reintroduce them, they are essentially brand new rock. That's my thinking at least.
What would you use to remove the phosphates?