Yeah the gold fish lasted about 4 weeks in there before I got sick of them.
The plywood was just dry screwed to the metal stand.
No real need to glue it.
The drains just work like normal bulkheads.
I have put a T piece on the back of the bulkhead so it doesn't create a syphon effect.
Ok so once the goldfish came out it was time for the scape.
Kept it pretty simple.
100 kg of black gravel
a dozen or so large sand stone rocks
and a couple of fake plants.