Hey all, I'm back in the hobby after 25 years. I recently set up a Max E-170 that has now been running for a couple of months. I'm about to swap out the carbon bag. The carbon bag that came with the tank was very full, and occupied the entire space between shelves in the media rack. I bought a canister of Red Sea reef-spec carbon and the instructions say to use a fraction of the amount that was in the original bag. How much carbon are people using? Thanks!