Call our office (800)687-6075, ask Kathy to send you a sample of Pond Boss magazine (go ahead and subscribe while you're at it). Inside the magazine are several advertisers who sell all kinds of water testing equipment. In order to collect a sample from bottom water, you will need a special device lowered with a cord. Or, you can buy a meter which measures temperature and/or oxygen, and the cable can be lowered into the lake to different depths. You can learn a lot from that data.
