[reefburnaby]

Hi,

One of the benefits of higher pH is that algae tends to grow slower in higher pH conditions and certain soft corals grow better in high pH conditions (for example, Xenias).

High pH can also cause phosphates ions to precepitate. Low pH causes them to desolve back in to the water stream. I believe this is one of the reason's why high alk can control green algae growth.

- Victor.