Sorry but I have to disagree with you Z4. Cutting back on light is rarely useful. Light is not the cause of algae blooms, nutrients are. Especially phosphates and nitrates. Besides, when you cut back your lights you are not only cutting back the lights to the problem algae, but the light to the benefical algaes and corals that are competing for the nutrients with the nuisance algae. Most tanks have an excess of nitrates, even if they are close to zero. The real culprit is usually phosphates. By removing phosphates with a combination of a phosphate absorber, carbon, skimming, mechanical filtration and siphoning you reduce the amount available for algal growth. Adding the appropriate grazer for the type of algae you have will remove the material that is already present. This is usually a combination of hermits and a variety of snails.

In ecology they talk about the "limiting nutrient." That is the nutrient whose concentration is the limiting factor in plant growth. While nitrates and light are necessary, they are rarely the limiting. Identifying and attacking the limiting nutrient is usually the key to controlling algae blooms. In aquariums that is almost always phosphate. We introduce phosphate in the form of food every time we feed the tank. That said, I AM NOT suggesting that you cut back on feeding. A lot of people are already underfeeding their tanks. However, you may want to consider how you are feeding though to make sure that uneaten food is not creating detritus that ends up contributing to phosphates.

Cyano is a little bit different situation because its not really an algae, but rather a photosynthetic bacteria. Check my post in Jeff's Cyano thread (are skimmers bad?).