As well as munching on algae, this species will happily eat a lot of problematic aquatic vegetation, such as elodea and duckweed. Raking. They appear to be healthy and look to be about 15 lbs in size. Maidencane Watershield 11. There are no guidelines for grass carp stocking density rates that … This is why some people use them for algae control in ponds. Do grass carp eat algae? My problem know is Algae plume, the lake is olive green in color. Did the Grass carp have any thing to do with it. “The grass carp was considered for introduction into the U.S. primarily because of its plant-eating diet, ... and Brazilian elodea. Grass carp will not control filamentous algae (moss) growth, except at stocking rates far beyond those suggested, which leads to other complications. They usually do not eat or control filamentous algae, large-leaf pondweed, cattail, bulrush, arrowhead, burreed. ... ** Filamentous algae * Watermeal 8. Frogbit Water primrose 10. I have watched them suck down large amounts of algae. In my 3/4 acre mud bottom pond I use 15 Isreali carp, 20 KOI and Channel catfish for my Fitamentous algae (rug mat algae)to control my algae. In fact, grass carp is so prone to blooms that in many areas it is only legally to possess the sterile form of the creature, so that the populations cannot get out of control. This is working well for me but it takes time for these fish to get big enough to eat a lot of algae. Planktonic algae White waterlily See the below for what weeds were found in Lake Chaffee in a 2009 study CT Requirements before liberation 1. Grass carp may control filamentous algae, although filamentous algae is not a preferred food. The algae was to much for the grass carp to handle so I poisoned the algae. Its least favorite aquatic plants are species such as water lily, sedges, cattails, and filamentous algae. Yes, grass carp eat algae! Although many publications claim grass carp do not control filamentous algae well, diploid grass carp always controlled it in Noble Research Institute ponds when healthy fish 8 to 14 inches long were stocked at 12 per acre and were contained with appropriate parallel-bar barriers across the spillways. How much to stock. What do Grass Carp eat? Pickerelweed Willows 12. They do not muddy my pond. Control usually lasted 20-25 years. These small fishes may feed effectively on filamentous algae, duckweed, and watermeal, but again their diets changes as they grow larger to feed almost exclusively on submersed aquatic macrophytes. Learn about methods for reducing algae on the algae control page. A Filamentous algae (many species) A Sago pondweed (Stuckenia pectinata) S White water lily ... grass carp do not prefer emergent plants and most importantly, the various species of ... is a plant that grass carp prefer not to eat. 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