Fish are well quarantined for months prior.
I've never had disease nor needed medication in my tanks for clients nor my own planted tanks for 15 years now.
And that's without quarantining.
Nick 23, I agree as well.
I'd remove the Discus, Rose lines, Mollies, personally and add more Altums/remove all other Angels and have more smaller fish schooling.
Few species basically and smaller fish.
I have a tank, 350 gal that's like that and it looks much larger.
But it's not my tank, I do what the client wants.
He will mature with his taste over time and he has already.
The tank is far from complete.
As far as ADA, well, this project had a different goal than aesthetics, this is a fish tank, not a scape with a few fish accents.
Many will prefer thios as there are many fish in here.
A lot of people believe that you have to have only a few fish to have planted tanks.
Such tanks likie these challeneg that notion and entertain th eye when beheld in person with not only the awesome plants/wood/rock etc but the shear diversity and mass of the fish themselves.
While initially many will look and think that's too many fish, this is a massive tank and with massive amounts of wood and plants and hiding places.
One might say a similar thing about many AF cichlid tanks also. But they do still might good
Regards,
Tom Barr