Clek, that tank continues to look awesome, and your fish look great also. I recently set up a tank with the same floor print but only 18" deep. I am attempting to have this as a breeding tank. Semi divided into 4 territories. I have my RTM, Argentea, Hartwegi, and Festae in it. I will see if it works, hopefully soon. There was a member on here that recently got out of the hobby, and he had the same 600gal tank for sale. I was 1 guy to late. I think that he gave Justin (JK47) first crack at it and he turned it down.
Anyway, your tank and fish look amazing and very healthy. Keep up the great work.