Somethingfishy,
by way of update, I found this guy who does big tanks, Rob of Aquarium 3. He has shown great attitude and willingness to get involved, so I have decided to go it with him. Critical was to determine the overall , final, size and location, as the new slab is being prepared. Plumber was here on Wednesday, then we plumbed the 'spagetti' for the aquarium, as it will all need to run from the tank, down to the basement where we will house the Sump, pumps etc.
Electrician comes tomorrow, so steel can be installed by end of the week, and with some luck, the slab poured next week. Thereafter, things start going fast, with blockwork and roof.
Hope to be able to sign off on the tank build this week, so it all runs parallel.
Still have a ton to finalize, with which pumps, controllers, lights etc.. but step at a time. Lesley's new build has given me great insights.
Keep you posted.
Jac