being as you are still cycling, it more than likely is diatoms, and if youare about done cycling, you could start your skimmer anytime, but if you are just getting into your spikes, i would wait(this is put here to avoid haveing to type twice), this may help, and i would currently hold off on water changes, until you are done cycling, other than that, jsut adjust your power heads, like baron said adn ride it out, also if you are about done cycling, you may want to start shopping for some snails adn crabs, or what ever you intend to get for algae control, i wouldn't add them yet but figure out what you are getting,
and showing diatoms, my guess is that you are near the end of your cycle, so hang in there, it will all be over soon