I use wood but my pond is a lot larger than yours and I need the structural integrity. Before my expansion, I used 1" steel tube and made a tent. You can use pvc, too. Just realize pvc and regular big box store plastic sheeting is not UV proof and you won't get as much longevity as you would with agro plastic and steel. You CAN also paint the pvc tubing to give you UV resistance.
Even if you do a tent/hoop house, it's important to get the plastic taut so the snow when it melts will slide off. And keep the distances between hoops/frame struts to 2'. I used 4' with my first tent and had a lot of bowing/holding melted water. You can make the plastic taut by putting sand bags or cinder blocks on the outside edges after you erect your tent/hoop.
And as addy chimed; take your polarized sunglasses and hold them in front of your camera/phone and the glare will melt away!