The blue looks great in the 55 with all of the black. Thank you for your advice.
Everyone, this is not as crazy as it looks

The cons were mis-behaving so I wanted to totally change their house and add territories.
I wanted to add an air bubbler to the tropical tank and Drac's tank. I just added substrate, I didn't change anything. I needed more substrate to hold down the bubblers.
I'm not responsible for Firecracker. The "princess" wanted a change, so that's all her fault.
See, just this once, I'm innocent

But just this once
