spear gun?
or try and get someone to cover it for while using their hand and then quickly try and chase him outa there with a stick of some sortNeed to get a cap today to cover the pipe. Hope he'll be alright in there for a while.
You might need a cave gun cos a 120 will be too longyeah that might work
I nearly forgot I have a ball valve on the overflow pipe so it will be easy enough to fill the overflow box to the top. Thanks for the tips guys