No concerns about secrets with trout...time is my big problem. I probably have at most 5 spare minutes a day this time of year!

I think most surface aerators & fountains draw from the top 5 feet of the water column. Our aeration philosophy with trout rearing ponds is that if you have bottom diffusers, surface aerators and a good water flow going most of the time, if one goes down the other 2 will get the trout through until the problem is discovered. We do this with most of our high density culture situations.

Cecil makes a good point about warming the water. That is another reason that we shut off our surface aerators during the day.

Mike Robinson
Keystone Hatcheries