Plants n such
Ya, I definitely try Aquaworld, but I'd to to the one on Gravois or just call them first. Here's their info. They have one of the nicest selections IMO.
3910 Gravois in St. Louis, MO
Mon - Fri: 10:30am-8pm
Sat: 10:30am-6pm Sun: Closed
Then you have Aquabid if you can't find what you need locally. That's my $0.02.