OK, OK. I am in the Collasium & have 2 of the 3 tablets. I have only ONE glowstone & that was given to me by the first mermaid you meet. Where are the other ones? I have checked another site & it says there is one in the "crab pens". If this is refering to the room with the 4 "cages" & three have crabs & one is a tunnel down, there is NOT one in there? HELP!!

PS- There must be a VERY talented plastic surgeon servicing those mermaids! Goodness...

It seems the location of the second glowstone can be random - some have found it in the crab pens while I found it in a chest in the middle of the room west of the initial mermaid.