carbon filters

[seashells]

I was wondering if anyone uses activated carbon filters in their reefs? What are your thoughts on use? Do you use them intermittently or continueously? Does their use affect trace elements?

Doug

[Ruth]

I use Black Diamond activated carbon in a Magnum filter about 1 week a month. No adverse effects and cleans up my water.

[robzilla]

i'm using blackdiamond also. running it for a week/ ten days, once every 6 weeks.