Thanks...

I understand that the carbon source is food however was not sure if the vodka offers a particular benefit over other sources. Also, I like the idea of simplicity. That is part of what has driven my quest for information on the matter. The other part is most of the bac systems i have seen, like you mention, are relatively algae free. I have pretty low nutrients right now and testing pretty well yet sill have GHA. It's likely due to the RO only water source. I have since added a DI canister and have noticed improvement but I still have growth, but it's not as strong as it was prior.

I have also read about Zeovit. I don't really want to run a reactor and would like to avoid it if possible. It would require lots of changes to my system (solana 34g AIO) that would be several hundred bucks worth of stuff, so that's the other driving factor in this thinking.

Again, I appreciate the info. Looking forward to my continued quest for knowledge.