I have trout in my pond and would like to keep them as long as possible and am thinking of getting an aerating fountain to run at night to cool the water and add oxygen. My question is will the fountain turn over the water the way a diffuser does as I wan to keep the deeper water cool for the trout .I live in WV and have been looking to add some floating plants like duck weed also. Any one have any advice to keep the water cooler ! Thanks