i woke up this evening and my arrow is just sitting on the bottom of my tank next to my channel cat... he always swims around... when the cat moves he'll move with it until my cat comes back to rest and he will sit right next to it...and he wont eat....i will try to my water checked tonight....anyone know wats going on !????! im gettin nervous....i dont wanna wake up and see him dead....he's 17 inches...in a 155 gal. did a water change 3 days ago