Floating islands are increasingly popular as a way to provide attractive centerpieces in ponds while improving water quality.

From the shore, floating islands look like normal earthen islands covered in plants, but they are much more than that. They are hydroponic systems that, when fully colonized by growing plants, are essentially wetlands that float on the water’s surface and provide many of the same services as natural wetlands.

If you own one of the 160,000 ponds in Mississippi, chances are you have invested tremendous amounts of cash and time in this resource. Building a pond can cost tens of thousands of dollars, and fish stocking, liming, fertilization and weed control are not cheap either.

Salt marshes are coastal wetlands common throughout the globe and visible just about any time you drive over a bridge along the coast.

STARKVILLE, Miss. -- Oxygen-related fish kills can completely wipe out otherwise healthy ponds, but there is a strategy pond owners can use to control this problem.

Anoxia -- the lack of oxygen -- can form in deeper water layers of a pond during warmer months. Deeper water is heavier and denser, which prevents it from mixing with warm surface water where air and oxygen-producing microorganisms are found. As deeper water becomes isolated, its oxygen levels are depleted, reducing fish habitat and increasing the risk of fish kills.