Some of you might know I have been fighting Green Hair Algae (GHA) for more than a few months and now that I have basically won I have to share what I did to fix the issue. I guess a little background might help. My tank is a 130 gallon (48"w x 24"d x 26"h) with a 30" trigger sump that has been running for about a year now so it is still fairly young. Things were going well this Spring and was growing anything LPS and a few sps. Had a slight crash where I lost most of my sps and a few lps due to no doser but since then parameters have been pretty stable. Noticed some algae back in May but really didn't think much of it. However, in July it really started getting bad and was very distracting as you can see.