Corner overflow cover lid for perfecto or marineland save live fish coral

Description

Medium corner overflow cover
-Fits
Medium
Marineland, Perfecto and many other corner overflows
-Measures 8.5" on the straight sides as shown in the picture.
These will also fit on the 7.5" overflows. They hang over and shade the intake to prevent algae growth
-Prevent Fish, snails and crabs from falling in the overflow
-Stop light from growing algae inside the overflow
-Made from durable and reef safe ABS plastic