Yaw that tank has been there for a long time if it is the same one they tried to get me to take many years ago. Apparently they made it for some one and he backed out of the deal. They then had it sitting in there back storage area and when they setup the 500g DT by the front window they used it as a bio mud bed for filtering the water. It was an experiment for a while as the tank didn’t have a skimmer on it for the longest time. Yup I new them when they first got into salt water, I also know the guy that set everything up for them in the beginning.
I for get his name but I would recognize him if I ran into him.

Bill