i do agree with Jacky view. it not an expensive product to use.
but it seem like a double edge sword. As Kanegan mention, it take out both good and bad 'impurities' in the tank. certainly people alway wants to keep the good.
and some believe that when the activated carbon is exhaust, it leed back all the pollutant.
sometime i guess it may be more damaging to introduce a product like this into the tank rather than good.
so i thought came up with this question to seek out view from fellow reefer.