can you post a pic? that will help determine what is going on with your shrimp
Shouldn't be an issue. I kept Cherries happy and breeding in a kiddie pool with nothing more than a airstone. They don't produce much waste and their oxygen needs are quite low. Assuming you nano is larger than a quart or two, it should be able to house a shrimp for 5 days no problem.I stopped in a petsmart on unrelated shopping spree (wanted one of their baggie anubias nana's to fill in a blank spot), and I came across the Maracyn 2 on their clearence rack, so I got it and some melafix.
I know its not good to half-ass anything.... but for one shrimp and treating in a quarantine tank, my extra sponge filter is one of the really big double sponge ones. Kind of takes up a lot of room in the QT. Can I forgo the filter and just use an airstone and extra java moss for the 5 days for treatment? Including a partial water change on days 2 and 4 prior to dose?