For those of you that are having bubble algae problems, do you dose Iodine or Iodide on weekly bases, per directions of you brand of Iodine or Iodide product?
Check your Iodine or Iodide to see where your values are on the chart, I recommend using a Salifert test kit.
IMO and experience, Iodide was the culprit for my first and only bubble algae problem.