I have two male Dwarf Gouramis and also a couple of female of the same species ......... one of the males has suddenly after six weeks gone quite lethargic and slowly circling in a clockwise direction, sometimes laying on his back or swimming erratically. Overnight he got a little better, is feeding and swimming in a more even manner, but after a few hours looks tired again.
The ph and nitrate levels are fine.
Anyone had a similar problem and how was it solved or is it too late, I am going to bed now and feel he may have gone before morning..