I'll take cleaning GDA over GSA or BBA any day ^^
My experience with GSA has probably something to do with the intensity of the lighting. Having my halide raised above the tank and other tanks next to the main tank (with the halide), i can see that the side of my other tanks are hit with GSA in certain spots where the Halide beams towards. No big deal, scrub scrub. In my other tanks that do not have halides but t-5's, i have no issues with this algae.
My experience with GSA has probably something to do with the intensity of the lighting. Having my halide raised above the tank and other tanks next to the main tank (with the halide), i can see that the side of my other tanks are hit with GSA in certain spots where the Halide beams towards. No big deal, scrub scrub. In my other tanks that do not have halides but t-5's, i have no issues with this algae.