i got a 10G brackish tank setting up very soon but i dunno what is a good fish for this setup im hopping for a type of puffer fish but if theres anything easier please tell me
knight gobies would be a good option, mollies too, theres tons of brackish fish, just go somewhere where a rivers runs into the ocean and test it at different points to find an area close to your tank, get some water and net some fish for your tank