Possible trade?

[Skunk Shrimp]

I want to downsize and trade tanks with somebody. Where’s the best place to post that?

 

[Gumbies R Us]

Post in the marketplace section of R2R that would be your best bet!

 

[Sisterlimonpot]

I want to downsize and trade tanks with somebody. Where’s the best place to post that?

R2r has a forum specifically for trading drygoods.

https://www.reef2reef.com/forums/trading-forum-dry-goods.145/

 

[Mr_Knightley]

I want to downsize and trade tanks with somebody. Where’s the best place to post that?

Finding a local aquarium club would be the best idea. R2R marketplace is country-wide and even into Canada, so you might get interest from people across the country who just aren't realistic to trade with.
There are local aquarium clubs all over, many of which operate through Facebook.