I've been using stability after every WC and it doesn't seem to help... I tested my water today and the readings are 0 ammonia 5+ nitrites and 5 nitrates. The nitrites have been 5+ppm for more than a week! The fish are skittish, shy, and sometimes breathe from one gill. They do eat but not aggressive, very catutious. Also whenever I come close to the tank they hide in the corner for 15 mins before coming out. I'm currently doing 80-90% WC daily, triple dosing prime, using a capful of stability daily, salt, and using TSS. At this point im worried about the fish...