3 weeks ago I stocked my IBC tank with 25 goldfish just to get the system going while I waited on my tilapia.
2 days later, all of the fish were gone.
We thought maybe they got sucked up the pump. Although there were no fish parts I the media...we thought birds got it.

Well I screened in the pump the day my 25 tilapia arrived. 4 days later all the fish are gone.
Disappeared. Not dead, gone.
I'm thinking raccoons or a snake...both of which are very populous in my BOL.

Any other experiences with this?

Do I need to put chicken wire over all the openings?

Greatly appreciate any advice.
Thanks
TexasDan