Well, I went to feed Gnag, and I could tell she HATED the duckweed. She went after one cricket and got a mouthful of it, and had a hard time getting the rest of the crickets. So, I decided "If it's making her unhappy or causing her troubles, I'm removing it."

So, after 2 hours of work, finding every last bit of this duckweed, it's finally clean. I also had a slight technical issue with the filter, but it's fixed. I swear, I did about 5x worth the normal water changes I do there. That's something I don't ever want to do again, although tommorow, I'll clean the duckweed out of Bumpy's tank, which should be easier considering it is smaller and there is A LOT less duckweed in it. For now, I'm going to feed them all and then get some shuteye.

Lesson learned: Never go ahead and add everything at once!