From what I have read, not all dry rock releases nitrate and phosphate. Actually, some think dry rock can bind phosphate over time.Not to put a cat amongst the pigeons here but I'm an old reefer and back in my day we were told go one way or the other because a mix of seeded/live rock with dry/non cured seeded etc would be pointless because of the amount of phosphates and nitrates that are released from the rocks that were dry going in? Do we just use chemicals to adsorb / absorb these now?