I's BBA. You can spot dose with excel using a syringe or medicine dropper. Mollies and amanos will eat it. So will ottos if it's dead. You have too much to simply rely on the animals. You need to spot dose. Use the initial amount on the bottle and each day spot does another part of your tank. Turn your photo period down. Make sure your ferts are balanced. Stick some fast growing plants in there. Trim off all dead, dying plant matter. Here is a link on algae types.
http://www.theplantedtank.co.uk/algae.htm
BTW, I noticed this is your first post. Welcome to APC!