Aquariums and Fish Keeping

There are a few very active Facebook groups for freshwater fish/aquarium info and trades in my city where a lot of that goes on, and people go in together on larger direct fish orders. But not sure how that would work in a city as large as NYC.

I hadn't even thought of that. I mostly go to local shops and conventions. Store owners will sometimes either trade or give store credit if I want to bring in healthy plants/fish (if the fish are in demand, not all fish are).

Facebook marketplace tends to have all sorts of aquarium stuff from people getting out of the hobby or moving, etc.

Some local fish shops have posters when trades will happen!