#tank emergency

Hello my fellow reefers, I have a 20 Gallon Frag tank that is acrylic, age of the tank is around 3 years. I noticed that the front pane now bows in the middle. To what extent is it acceptable for a acrylic tank to bow or once it starts to bow it should be replaced. No leaking .

I need help… I have been fighting high nitrates I feel like FOREVER. I purchased the HR Hanna test kit and found that they were over 150. I completed water changes and system maintenance and brought them down to around 40.84 but they are uncontrollable. I also cannot get my PO to get on the...