Hey Comatose, thanks for stopping by and giving input.

I'm lucky that I have pretty dark containers but taping them up will definitely help. When I do I will be using aluminum duct tape rather than traditional cloth duct tape as it blocks light with a single application. I will also add a couple of check valves - one for each air feed line - to keep the system from backflowing into my air pump and causing problems.

I encourage anyone that has ideas or suggestions to post them here so that we can spread the info and learn from each others experiences and mistakes.

MVP :jointsmile: