Stupid snails....
 

Anyone else have issues with snails jamming equipment? I had one in my skimmer intake and I'm positive I've got another one in my gate valve....I very rarely have to readjust the gate valve and recently I can't keep it at any level. When I adjust, something seems jammed in, hard to turn and some grinding noise.....

Stupid snails.......

That's why I have a screen on my overflow to prevent that its not 100% effective but it does the job