They’re JBJ 65 gallon tanks - 36” wide. I was going to take readings this week, but my light stopped connecting to the router so I can’t change programs. Tried every combination of button presses and cycled power to no avail. Called and contacted support via the web site, but they said they will have to look into it and get back at a later date. Once this issue is resolved I’ll post results in my build thread.