Aquarium Algae is a good reference for identifying algae and what to try to get rid of them. I second the comment about the high light intensity. Almost all algae, if not all algae, grow in response to light. So, the more light, the more the algae will grow. I find I have much better luck running my 2.4 watts per gallon for only 8 hours a day.
First pic looks a little like Cladophora algae on the substrate. Tough to get rid off, but it might not be clado which generally looks a little darker green and is more branchy Best easy kill for clado is direct spray with a dosing syringe of Seachem Excel a few mls per algae bunch with the filters off for 5 minutes. and with care to not OD the tank/fish. I never put more than 20 mls Excel in a 65 gallon every couple of days to kill clado. One good squirt and its dead, and plants love the psuedo CO2 of Excel. But it may be a more generic green fuzz algae which will be a lot easier to defeat. Regardless... Good advice from Hoppy and danepatrick. Reduce the light and water changes will help bigtime.