fish such as... doviis, umbees, and about every cichlid that is cool, and of course common stuff like oscars and dempseys...maybe some odd fish like clown knives, lima shovelnoses and arawanas but no huge fish that get over 3 feet as hese will not get a good home... also small community fish beacause newbs always like them as well as some experts here on mfk with amazing planted tanks.... Should cary tanks that are at least 100 gallons as the biggest for reasonable prices...You could also just display a few tanks and order them in for the costemers to save space in shop...Also carry small tanks for newbs but not too small, like smallest 10 gallons.... Fish food that peaople like us use, like hikari cichlid pellets, omega one, massovore delight, NLS, and of cosrse brands like tetra and topfinn... large pythons, for us MFks we have big tanks and need big and fast pythons... ,powerstrips, aquarium equitmesnt for reonable prices beacause if prices are high people will order online instead... Cheap gravel like the stuff you get at home depto, rocks, cool decor, coreful gravel, ... You have to relize most fishkeepers are newbs with small tanks so maybe half the fish can be cool and half can be newb fish to make people come... and half cool equitment and stuff and half newb stuff to keep the store alive... also sell other pets food to help keep the store alive... have some 100+ gallon display tanks to make people come and stay longer to watch them... Also to inspire people to buy big tanks with cool fish... and give good advice to help people from beginers to experts... my 2 cents...