i am just in the process of setting up my first reef tank.
i have loads of tuffa rock which i got with the tank (second hand).
as warned me not to use tuffa rock, they said that over time it can store phosphates and nitrates and then release them into the tank.
he advised that i should buy ocean rock from his shop (which incidently looks just like tuffa).
is there any truth in his theory, or is he just trying to get me to buy his rock?
just for info, i will be putting in about 30kg of live rock as well.