In addition I will point out that even if you do QT everything and remove all algae that you can spot on everything before adding it to your tank, algae happens. In the end the best way to mange algae is to insure that you manage the nutrients in the water, using at least a couple of nutrient export methods. There are a lot of nutrient export methods out there the key is to test your water and find a set of methods that you can keep up with that will keep up with the nutrients in your water. In addition you want to insure that you have some number of algae predators in your tank. After that the one other thing to keep in mind is that when you do get algae manually removing it will have a big impact if you are also managing your nutrient levels. I find using long tweezers or forceps along with a 1/4" siphon line let me remove all kinds of algae w/o siphoning too much water out too fast. The extra water change should help managing algae provided your source water is free of nitrates & phosphates.