Pond Boss Forums INTRO Questions & Observations Ok to add lime now?

Any reason why I need to wait until Fall to add Ag lime, not hydrated, to my ponds? I was told by an "expert" to wait until Fall or Winter to add it but he couldn't really say why. My plan is to run a spreader truck along the perimeter. I can't see what it would hurt, but then again, I figured that I better check. TIA....