I just realized I was reading the requirements wrong for goal 10. I have 2 of 4 needed marbled aquariums for the third step.. and the if the wooden ones for the forth step require 4 marbled each, then I need 18 more marbled ones. Good grief. I had to check my math 5 times (means math and I are not friends) just to make sure I was doing it correctly.. because this is kind of insane.
I say again, the merman better drop some seerriioouusss energy