brackish

So, did all my WC today, same procedure as always, for years. I have one 40B brackish at 1.01sg at 69 degrees. At some point this morning I noticed the only fish in the tank breathing heavily. I thought even last night he wasn't 100% and wasn't interested in food, but he usually only eats...

So the 55 is set up, canister filter running and I'm thinking of going brackish. Mollies, gobies, orange chromides and monos. What I'm wondering about are plants . . . are there brackish plants? maybe more fish species? Thanks for any info

hello, can synodontis be kept in brackish water?