How much Roz Carbon and GFO to use?

[stellarfly]

Hey guys, Im sure this question has been asked many times over. However I am new to this site and I could not find the answer and I have checked on the forum. My questions are:

1. What is the method of measuring the amount of activated carbon needed in a 90 gallon reef tank. Or any sized tank for that matter? is there a calculation? like cups per gallon or something?
2. Also how much GFO? I see a lot of dual reactors, but no body states how much of each goes in. Does it even matter?

Thanks a bunch

[shootingstar]

Go to the BRS (Bulk Reef Supply)website.
On the right side of the page, click on the clownfish pic.
It will take you to a calculator to firgure out what amounts you need.

[stellarfly]

Thank you so much! I just found it! What a great site!!