I had a lorex bullet camera, a huge rock fell on it and cracked the lens. Via the web I finally found another underwater camera (that will feed into our dvr system) This one is a dome camera. More of a wide angle view.
The only issue I see is debris tends to settle on the top of the lens, no biggy really unless the sun is hitting it. Then you get light scattering. I love watching the fish via the house, the view constantly changes. One year I watched a frog wake up, first time up from the bottom where it overwintered. Swam right by the camera.
If you have a video monitor, tv that accepts coax cable hook up, you could just feed the camera right into the monitor. It does not need to go through a dvr system. I like being able to record now and then.
Here is a link, I found it in my emails, lol. Before I bought it I called the company to confirm it was underwater proof, not just weather proof.
http://www.surveillance-video.com/svv-60irc40l2812d.html
The biggest issue is the power and video line coming out are only 2 feet long. I used some cpvc to run the lines through, sealed the ends with silicone so no water would get to the connection. I put this camera only 1.5 feet under the water. My other one was 3 feet down. We have a 100 foot line running to the house for the video feed, I have a power supply plugged into it down by the pump. The video line runs up to the house through some pvc my dear honey suggested we bury when we were digging the pond. We buried 4 different pvc lines for ......whatever lol.