I want to start running carbon on my aquarium again, from time to time as needed. I am thinking of using a BRS dual reactor i have as follows, place carbon Rox in the first unit and a sediment filter in the second housing (which ca trap carbon dust if any). The reason i am thinking of this is to prevent any carbon dust from entering the system due to the fact i have a purple tang and do not want him getting HLLE again from carbon. In the past with chemi pure usage he got HLLE, i took the carbon/ chemi pure off line for a year and his HLLE cured 100%. I have attached an image of the reactor for anyone who is not familiar with what it looks like.