After two years of maintaining an almost problem free tank I started getting outcrops of Bubble Algae. The cause most likely was water quality or the lack of it. Thanks to the help from members of this Forum in figuring this out. Unfortunately the algae doesn't just go away. So on a regular basis I have to "harvest" it so it doesn't overrun the corals. I use a dental hygiene tool I got from my dentist. I attach it to a 3/8 ID tube which is part of a siphon. As I pick the bubble algae off the rock it gets sucked into a bucket. The maintenance was about 2 hrs. /day. along with routine water changes. A month later I'm down to 3 times a week. I hope your tank never gets this problem, however if it does, the dental hygiene tool really works great. Dentists throw them out after awhile because they become dull. My dentist gave me the one I have. They're stainless steel so you don't have to worry about rust or corrosion.