I got a 16gal bowfront last year. Got a nice standard gold angelfish and a few months later a smoky blue-blushing lace veil or superveil. I also got a few dither fish and what I thought were spotted or leapard cory cats from walmart. Well the cory cats turned out to be synodontis eupterus (which get up to 8"). Also about this time some of my fish started showing camallanus worms, the worst case being Spaz, my smoky angel. It took me a long time to find some levimisole, ordered it from Great Britain. And it did not get rid of the worms, very resistant. Finally got some Panacur (fenbenzadole) from my vet and after 5 days of treatment, the camallanus worms are gone. Unfortunatley, the worm problem affected Spaz's dorsal fin. It ended up so bent it would tear when he tried to raise it and greatly hindered his swimming. His dorsal and anal fins were each twice the height of his body, his tail is a little longer than his body.
I finally got my 72gal bowfront set up and moved my poor overcrowded fish there. I trimmed the dorsal by 2/3. It was bent so badly it would tear when he raised it and hindered his swimming. The anal was trimmed to even his swimming and keep the dorsal from regrowing too quickly.
He is much happier, and swims much better, and he loves raising his much shorter dorsal.
The two angels are a breeding pair. They love to show me their eggs when spawning, but get very defensive when anyone else goes near.
The synodontis eupterus love the new tank as well and get along peacefully with the other fish and each other.