You treat cyano
pretty much the same as you treat almost all algae blooms... starve them
Algaes feed and bloom on excess nutrients (nitrates, phosphates, etc.), and also grow well under certain light conditions (old bulbs that have "shifted", extended photoperiods, etc.).
So in order to starve out the algae you need to do a lot of what Ziggy mentioned.
You really need a mutli-prong plan of attack to succeed.
are a cheap and quick way to get excess nutrients down.
Shortened photoperiods will help slow it's growth as well.
Reduced fish feedings (every other day) will help keep excess uneaten food from becoming a snack for the algae.
Cleaning, or removing filters and sponges that trap waste and become nitrate factories will help.
Your tank is 1 year old which is about the maximum time that's recommended before changing your bulbs.
As bulbs get older their light spectrum tends to shift into the red which most algaes love.
One other thing about cyano
that makes it particularly nasty is it's ability to feed on itself when other food is taken away... basically making it self-sustaining once it really gets growing.
To help prevent this, siphon out as much cyano
as you can see when doing your PWC
Don't worry about sucking up some sand with the cyano
You can dry out the sand and add it back later after all the cyano
Lastly, some people don't like adding anything to their tanks, but I have had good success using a product called Red Slime Remover by Ultralife.
This is not a permanent solution!
This will just help knock down the cyano
for a few days while you find and correct whatever is causing it in the first place.