4" Gar got his head smash

[Dee eng]

Here's a pic of it when it was alive.

 

[888fish]

I have a diy strainer attached to my intake in my tank ,this intake leads to my pump in my sump. Also have a siphon break drilled too. Maybe you could install a check valve to your plumbing? I do all this to prevent my Moray eels from getting sucked into my pump in case of a power outage.