Let me start off by saying thank you to everyone here. I've been lurking for about 2 months now and this site is a wealth of information. I live in Michigan and we have a small pond, a little under 1/2 acre. After reading quite a few posts I've decided to use Cutrine Plus granules this year to try and help with my algae problem. My question is about how much should I apply during an application? I'm also wondering about the weight of this product. The place I was going to purchase from has 12lb & 30lb packages. Obviously the 30lb package is cheaper. I'm wondering about how much I would need. Any suggestions? Thanks.