I have an acrylic 90 gallon 4' tank. The only panel I have noticed this on is the top panel. All side and bottom panels are clear and imperfection free. Just curious if this is seam separation or standard crazing. Trying to make a few decisions on my setup and this may make things easier to decide on which route to go once I know. To my knowledge it has been this way since setup over a year and not gotten any worse.


