is there a need for GAC with an ats?

[SantaMonica]

SW zero, FW 0.1

[Wopadobop]

I do run gac for this very reason as I am not sure if scrubbers take up coral chemical toxins. Just to be on the safe side. Stuff is so cheap anyway. I have noticed it does last longer and the carbon source cant hurt the ats either.

[SantaMonica]

No, algae probably does not take up much coral "toxins". However, these coral "toxins" are DOC food too, and will be eaten by bacteria (and corals too) in a few hours.

[Garf]

Has anyone noticed if there is a correlation between running skimmers and GAC, and cyano and dino's. Ie has anyone noticed the cyano, DINO problems getting better when they remove skimmers and GAC from the system (or the opposite).

[kerry]

I have had less of both since running w/o them. I still get them with the scrubber but not near as bad.

[Doompie]

Sometimes when i'm lazy on the cleanings the water colors up green/brownish..but my main "issue" was the build-up of particles in the water column.. which builded up that much that they were very visible on the surface..the skimlayer on the surface of the displaytank (which I never had before..) So the particle build-up became quite heavy over time..at a certain point, when i'd put down my arm in the tank, it was "covered" with these particles..So not too nice..life stock didn't seem too matter though..

No water replacements done ever, havn't had anything in the system except the ATS for almost 10 months.. So I figured: just added a tiny bag of GAC (10 Tspoons) can't hurt..
The coloration vanished within a week..also the particles cleared down.. after one week replaced the GAC, kept it for another week...and all "issues" where gone..
Removed the bag after that two weeks.. now waiting for the next "mandatory" moment