For the past few weeks my beta Linus has been acting and swimming strange. He used to be very active and swim a lot, or when he did rest he would always lay on the leaves of his plants in his tank, but he has since done a complete 180. He rarely swims around his tank anymore and basically lays on the bottom all day on his rocks instead of his plants. He still comes up for food right away every morning and is eating fine, and once and a while comes up for a quick gasp of air but then he just goes right back down to the bottom. He seems to be struggling to swim right. He doesn't float sideways or anything like that, but whenever he tries to swim he just goes up or down or only gets so far up then sinks right back down like it's hard for him to hold himself up. I'm not very familiar with a lot of diseases and such, so this is based off of what I've been reading. I looked him over and I don't see any strange marks anywhere, it's just basically the swimming so I've been wondering if it's swim bladder disorder/constipation or possibly depression? Last semester at college when I first got him he always sat next to my roommates beta on the counter but I've since moved out and now he's alone. For the SBD/constipation I've read that apparently moving them to a more round shallow bowl instead of a deeper bowl (which he's in right now), letting them fast for a few days and feeding them the insides of a cooked pea works well, other than that I'm not really sure how else to make him feel better. :C Any tips or advice is greatly appreciated.