Just a question. Is it possible to run to much carbon? If so could it be a reason for GHA outbreak. I went at least month with no fish and not feeding anything in my tank. All I had was three mushrooms and some zoas. Not a lot. I was doing 10% water changes every week and still had algae growing. I wrapped my tank in towels for three days and none if the GHA was gone. I think it grew more over that time. I am running a canister filter and every water change I clean out the canister. I started using seachem matrix carbon and I'm wondering if too much carbon is causing the outbreak. Is that possible? Any help would be great. I was using RODI water from my lfs but recently purchased my own 4 stage from BRS. Any help would be great. Thanks