I CHANGE WATER
Join Date: Jul 2012
Location: Saratoga, NY
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Re: 3.5g Pico
Probly no fish will be happy in a 3.5.Not even a barnacle blenny.
As for shrimp I think you need to stay on the small side also,like a sexxy dancer shrimp.
As for corals it is all on the light as you could possibly get a frag of almost anything these days.
I would stay clear of any filter feeding corals(non photosynthetic).
Featherdusters don't care about light and are real cool..
The big"fish" that might fit is you will never generate enough food (pods...) for them in a 3.5.
Pipe fish or seahorse come to mind if you can get captive bred,they will eat frozen food.