prepping pond for winter
 

Greetings all,
i have a 2500 gallon backyard pond here on Long Island, New york. It
is starting to get around freezing here now. When should i disconnect
my submersible pump and dump out the biofilter, etc...? Is it too soon?
Have a Laguna WG 10,000 pump and a Laguna 4500 pond filter. Also should
i stop feeding now. Have about twelve 9 inch koi.

Thanks,
Tony