Let the algae be until the nitrite comes down. Then you can remove some mechanically (gravel washing, scraping, running filter media under tap). While the tank is 'still cycling' you don't want to take out any of your good bacteria. Algae feeds on ammonia, nitrite, nitrate so it is taking out stuff that might other wise be killing your fish. Once you have the nutrients under control, the growth rate of the algae will slow down. What you must not do is kill the algae and leave it in you tank rotting. Dead algae becomes ammonia, it's like way overfeeding your fish. Scrape enough glass so that you see the fish and siphon out what you scrape off. Other than that wait until your other problems are under control before taking any action. This exception is if the filter media gets so clogged it restricts flow, in that case scrub the algae off the media with a brush in waste water.
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