Hi everyone. I currently have 3 aquariums. One 55 gallon is home to 6 cichlids. One 55 gallon is home to a common pleco, 3 dojo loaches and a bristle nose pleco. And I have a 40 gallon that is home to a dragon goby. The only one I do not feel too confident in is the goby. I need to convert his aquarium to brackish without shocking him. Any advice would be greatly appreciated as I am finding it difficult to find any information.