So 8 days ago I got a male betta, and he was doing great until yesterday I noticed that his tails seem clumped together, and he has difficulty swimming around. I tried to trigger his flaring, because I thought maybe he’s just resting due to his heavy tail, but his tail won’t spread even when he flare his gills. I did a 30% water change, and gave him a salt dip, he looks better(?) I think. But should I give him further medication or is it just lethargy?