This Water Level Adjuster will Rise your tanks waterline by about 1 inch letting you use the AIO chambers in the back for filtration as intended.. The Innovative Marine 25 has a design flaw, this will allow you to correct it.

It is 3D printed with PETG which is Freshwater, Saltwater and Reef Safe.

You just simply push it on the overflow intake and it is kept in place by positive pressure from the water in the tank. It has 2 guiding tabs. The shortest distance to the edge faces the bottom edge of the overflow.

-

You get 2x  PETG 3D Printed Water Level Raisers.