Okay, so this is what I have heard and come up with so far.
As far as non-stock stuff
-a club card with some kind of discount program
-an email newsletter
Okay, as far as dry goods
-a selection of the usual stuff, ie heaters, lights, gravel, cleaning supplies, etc.
-Kensfish's food
-Variety of substrates, like Flourite, EcoComplete, CaribSea
-Medicines and treatments like coppersafe, medicated fish food, maracyn 1 and 2, methylene blue, malachite green, erythromiacin, furan
-peat for filters
-variety of plant ferts, liquid and dry
And livestock
-variety of brig colors
-FW shrimp
- nerite snails
-celestial pearl danio
-'nano fish'
-ember tetra
-scarlet badis
-pygmy and dwarf corys
-dragon goby
-mini moth cat
-knight goby
-bumblebee gobies
-mudskipper
-wild bettas
-wild livebearers
-white cloud minnows/meteor minnows
-pearl gourami
-honey gorami
-killifish - lyretail, clown, gardeneri, gularis, golden dream, american flagfish
-knifefish
-kuhli loaches
-yoyo loaches
-Bristlenose plecos
-Other bright colored plecos, like clowns, starry nights, gold royals
-blue eye rainbowfish
-farowellas
-pencilfish
emperor tetra
-splash tetra
-badis badis
-african butterfly fish
-celebes halfbeak
-ropefish
-fire eel
-quality angelfish
-peacock bass cichlid
-pike cichlid
-parrot cichlid
-peacock cichlid
-goby cichlid
-compressiceps cichlid
-frontosas
-orange crayfish
-cloning crayfish
-apistos
-rams
-kribensis
-shellies
-laser cory
-adolfoi cory
-t-bar cichlid
-keyhole cichlid
-rainbow cichlid
-columbian tetra
-congo tetra
-green fire tetra
-rummynose tera
-FW gobies , like stiphodon, rhinogobius, desert gobies, peacock gudgeons, sicyopterus
-birchirs
-elephant nose, baby whales
-flagtail catfish
-festivum cichlid
Anything else, anyone?