Actually, I have to disagree about trimming the spiralis. Crypts aren't exactly like a piece of hornwort that you can chop up and get a million plants inside of a week. They are kind of slow growers and also recover rather slowly. Also, the algae will usually grow back on the new leaves before they are even back to where you started.
I have a bunch of spiralis in my 75 that was CHOKED with a bright green algae that grew like nothing I have ever seen before. I removed about a pound of the stuff every 3rd day. As it turned out I just had to turn down my lighting until my other plants got growing. As soon as I turned the light down, the thick mat of green algae had disappeared in less than a week. Right now I am a little worried that there isn't ENOUGH algae in the tank for all of my amanos...
If you don't have a lot of high light plants in your tank, I recommend decreasing the lighting for a couple of weeks, assuming your other water parameters are where they should be. I can't say I know about ALL crypts, but I don't think I have seen one that requires high lighting. Most will do fine in lighting low enough to make your algae go away.
It's worth a try if nothing else. The most important thing is to keep the algae away long enough for your plants to get established and your phosphates close to zero.
Two 1 GA desktops, a 5 gallon, a 2.5 gallon, a 10 gallon, a 20 gallon, a 25 gallon, and two 75 gallon tanks, all planted.
I am an expert on algae, so ask me if you have questions. I know how to grow it, just not how to get rid of it.