Not sure if the asap is the correct place but I do need help before it dies. Heres my story.... I've had my lawnmower for about a 10 months, he's about 4-5 inches. Always stayed fat and pooped regularly. He eats anything, feeding has never been a issue. I always get a little diatom/algae on the back glass that he is constantly munching on it throughout the day. I also feed the tank Ocean Nutrition spirulina flakes, Ocean Nutrition formula one flakes, dried mysis daily and formula one tiny pellets. He eats it all. I feed rods reef and frozen brine soaked in zoecon about once a week too. He's always ate everything and still is. My problem.....he can't/won't poop and hasn't for at least a week. In the morning, his stomach is almost inside out, its a saggy, stretched dimple, looks pretty bad. Mid afternoon its HUGE from eating algae and diatoms, then he eats his food I feed once a day around 5pm. Then at night (around 8pm) he throws it all up. Its like he eats as much as he possibly can throughout the day, then lets his stomach get the vitamins, then throws it up. I'm assuming he has some sort of blockage and can't pass bowels, maybe a sand granule?. Any help would be greatly appreciated. I don't wanna lose this personable fish. I heard about increased salinity to get things to move, but haven't been able to find any info on it. Should I look into other food sources? Maybe that will help resolve? I'm going to start feeding the tank nothing but rods soaked in zoecon for the next few days and see what that does. Let me know if you can help me out. Issue has been going on for a week and his stomach is looking worse and worse.