i was able to get rid of algae this way. obviously a couple snails and crabs will help. the lighting is not an issue leave it alone. in fact maybe bump it up to twelve hours. make sure all filter material is clean or replaced. remove the carbon for a while. do weekly 10% water changes. if you have a dsb
vacuum the top layer when doing the water changes and only do half the gravel per week. if you have a ssb
then vacuum to the glass and do half per week. eliminate all addatives like coralvite and phytoplex and such. cut feeding of fish to what they can consume in a 5 minute period and feed every other day. unless using nori for tangs then i would everyother day and for a few hours. do this and be patient and in about 2 months your algae will be gone, without scrubbing. you can then up feedings if needed and add some additives but increase slowly and always keep an eye on your algae.
also those green mythrax crabs are great at cleaning rock. people say that they can cause problems but ive never experienced any. and that is fact not hearsay.
also i would recomend replacing filter material (if used) and not cleaning. an exception may be those filter socks as they are expensive, but then i would investigate an alternative. and replace filter material each week.