Hi everyone, i have had a siamease fighting fish in my tank now for 6-7 months everythings been fine intill 3-4 weeks ago. He has been a bit sluggish sitting on the bottom, he swims just fine but im worried about this behaviour as he hasnt don it before. I have added some king british revitaliser which is basically liquified salts is there anthing else i can do apart from this and water changes? Thankyou for your help.