I've never started up an aquarium club but I was the Senate President for my college and clubs are basically all the same.
1. Try and get about 10 initial members to start so that you can have some input on what the clubs goals are.
2. Set up some set of rules or guidelines for the club, i.e. like a comstitution stating rules for members, dues, and goals.
3. Some extra advice
- Try advertising in local free newapapers, the ones that you find in local coffee shops. They have cheap ads that would be easier to afford. Also ask local fish shops to post signs in their stores.
- You might also wanna see if a store would sponor you, maybe giving your members like a 10% discount at their store. You might have to increase yer dues some and pay them a lil but this would increase their sales and give your members a incentive.
Good Luck ....