Yeah I was wondering about this. I read in a thread down this forum that carbon contributes to HITH and I was like...huh? I've never heard that before. Not calling anyone a liar but does anyone have any research on this they could link us to or at least an explaination of WHY carbon would cause HITH?
Of course as a few have pointed out...you don't NEED carbon. So mabye we should all pull it out pre-emptively anyway!
I think it is just those who don't do enough water changes and rely on carbon to clean the water and their oscars get HITH and blame it on the carbon when they take it out and do more water changes.