can someone tell me how to get rid of this????

I agree on the flow suggestion. Cyano hates flow. I would add 2 koralia on oposite ends as suggested by ComputerJohn. Also, if you don't want to spend the cash on Koralias, you can buy a Maxi-Jet and the propeller mod for it. It really, REALLY pushes water like crazy and it's way cheaper. Compare prices and make your choice, don't take my word for granted because I haven't seen what the Koralia prices are now days.

One thing you can do to confirm this, is to watch how the food moves in the water flow trough the tank the next time you feed. I bet ya that the area where there's less flow, is where there will be more cyano.

Good luck!

PS: Manually remove as much as you can, then add the power heads.

 

You can try and siphon out what you can to remove the algae in the short term and adding more flow via powerheads as suggested should help too. Cyano problems are usually caused by aquarium water with excess nutrients like phosphate, nitrates etc. In the long term you may have to examine how you care for your tank. There are some commercial dry foods also contain excess nutrients and other undesirable things like nitrates, phosphates etc so I strain/rinse my fresh/frozen foods before feeding my tank. You may want to consider feeding your fish less often. Also using RO/DI water and a high quality salt with little if any NO3, phosphates etc like Tropic Marin will really help too. Adding a phosphate remover and increasing flow in your tank may help too.