What exactly is normal? Objective answers are better, because it allows other people to draw conclusions without being colored by your opinion. As someone else has said (not to you, but the logic is sound), if you need help, use numbers and facts, not opinions, so other people know what you're seeing and are able to help out better.
The smart folks who'll be able to help you diagnose are going to have more and more specific questions. I'm just asking the basics to save time.
125 planted? Heavily? Lightly? Low or high tech? Do you dose anything into the tank other than dechlorinator? If so, what, how much, and how often?