Here in IL it's still to early to even think about your pond, but I expect with the warmer temps it's just a matter of time before someone comes in asking questions. It's our advice not to do any BIG cleaning in the spring for several reasons and I'll just ask for what everyone else thinks. I've never had a pond myself. The first thing everyone wants to do is empty the pond and completely clean it in the spring. Then they can't figure out why they have green water and dead fish in late May. I'm still waiting for a big snowstorm yet, but today it's 60 degrees and stormy. What kind of spring is everyone else having?