most algae cycles in aquariums are normal. When they show up, changes between all tanks depending on how they were cycled and there stability.
to confirm any assumptions always test your water. first look at your NITRATE and PHOSPHATE. this will help determine the kind of algae you might have, and an obviouse description from you will help more then anything.
Also what source of water are you using. Tap, well, RO. RO water is by far the best water to use for any aquarium IMHO, and water is usually the most common cause behind algae issues. the amount of fish you have, to the size tank you have, feeding to much, and a lack of current are other possible causes.