My frog's leg appears broken

[rodsboys]

If you have a glass lid it should have a plastic strip on the back to allow for filter adjustments. I cut a section out to fit my filter in. Then I used clear packing tape to cover large opening above the output (waterfall). I've had a frog escape into the filter so tape is a must. You wouldn't even see it so it works out nicely. ./

I'm even more primitive than that. I use folded up "fish towels" over the gaps in my lids. lol