I just took a look at my overflow and it looks like it's about 1/4". If you have a Dremel, you could drill the hole at the bottom of the tooth and then cut the sides of the tooth with the Dremel using one of the large rouind disks. Lacking a Dremel, there are drill bits that are supposed to be able to be used as side cutters. Keep an eye on the drill bit-as it gets hot it will start melting the plastic and it can get kinda messy.
Originally Posted by Veni Vidi Vici http:///forum/post/2944133
You really dont even need to cut in teeth.I built my coast to coast without and it works just fine.
+1. An overflow without teeth will skim better.
Originally Posted by kevinbeatzeus http:///forum/post/2944487
Really? the smaller fish wont get sucked over? that could be a wonderful thing
I have egg crate over mine to keep the snails out.It works good