Sea ice is the ice floating on Arctic Ocean! When it melts it does't cause sea level to rise. This is 4th grade science. This same principle works with ice cubes in a cup of water, frozen ice of the Great Lakes, and sea ice in the Arctic Ocean. When ice melts, it doesn't change the water level. It's the land masses with the snow and ice you have to worry about on sea level rise.
It's the ice sheets in Greenland, Antarctica and elsewhere on land that when it melts it flows into the ocean much like a turning on the spigot to your bath tub to fill it up.
Every year the Arctic sea ice loses roughly about 10,000,000 square kilometers of ice through melting. And every year it typically gains that much ice back during the cold winter months. The lose of sea ice hasn't affected sea level rise, if it did then we would see a bobbing up and down sea level rises with the freezing sea water and melting of sea ice.