Hey everyone!

This is my first post on the forum. I hope I'm in the right place. :)

I'm looking for old, vintage or "odd" bubble-up filters you may not want anymore. I've been keeping tanks for several years focusing mostly on books and equipment in the hobby. I'm doing an informal study of these older style filters from early on and a) hopefully setting up actual tanks using them, and b) working on a possible new design of an air-powered filter that can be used on very large tanks above 30 gallons.

If you have any that you think could be interesting please feel free to let me know. I can either buy them off you if you're willing to sell, or I would also just be happy to see pictures of it should you be willing to go through the trouble.

Thanks so much for your help, and of course feel free to send any & all questions you may have!

Take care,

Paul