Alright so I came home from football workouts yesterday to find my tire track pressed right up against my heater and a rock his whole left side was badly burnt and I quickly changed him into another tank because he was still breathing but I later decided his fate that he would die because when I came home he was belly up it was to late he was about 10 inches and the size of a quarter and a half around ik fat right but the thing is the temp in the tank is 80 degrees and that's perfect I later tested my water and my nitrate and ph levels are high everything else is good. Here's the thing today I decided to test my tap water and the nitrate levels in it are zero while in the tank they are high af any answers to why that is? I added nite out to mess with nitrite levels in case they were affecting it as well as ammolock for ammonia just in case my fire eel is currently in the same tank my tire track burnt himself in but I took out the rock so he can't pin himself. Also when I moved the tire track the other day before all this he feel on the ground but was on carpet could this have any correlation to why he died? I love eels and have spent to much on eels for any more to die I also have a Columbian spotted pleco in that same tank and he's not cheap so I don't want any more fish to die can y'all help out?