So I have 4 rb's about 3 inches or so in a 75. I typically do two small water changes a week and that keeps my nitrate down. Or so i thought. The last couple of days i noticed the two smaller of the 4 acting weird swimming in constant circles and turning sideways and slamming into the gravel. They hit it hard too and keep doing it. Whats really weird is that one of them his lower jaw is just hanging down and he never closes it. Never seen this before. So i checked the params again and i got a very high nitrate level, i believe its around 60 couldn't tell for sure because of the liquid tests with the reds being so close in color. So i spent yesterday doing three massive water changes and managed to get it down to about 10 wich should be ok. There still acting weird as hell though. Could they possibly be sick, is their anything i can do for them or just ride it out? I realized why i wasn't getting the right nitrate readings is because i don't think i was shaking up the bottle long enough mix it properly along with the test tube as well (note to self!!) Any ideas would be great!