It looks like the bubble algae has completely covered your overflow and live rock. If your reef is still somewhat new, it may be easier to drain the tank and start over. Once your reef is overtaken by bubble algae, it can smother out your corals and wreck havoc ...if you just had a little bubble algae, I would recommend manual removal without popping the bubbles, but in your case, it appears to be established.
I had a lot of bubble algae in a previous tank..my SPS corals were fine but the algae was definitely an eye sore and grows/spreads fast. It thrives well in the home aquarium if left unchecked.
I added various crabs and fish to help control it to no avail.