Ok thank you so much for that advice, My background and the sides fit tight there is no way a blade of grass could get behind it let alone a betta. The bottom is under the gravel level the top is level with the tank.Alasse said:I'm sure water gets between them, hasnt caused any issues though so far.
I silicone it the best i can, mainly to prevent fish from getting behind rather than water![]()
Once again thanks for the help and sorry for kind of hijacking your thread, Your advice will also come in handy to others who want a 3d background.