On March 2nd I purchased a 2" Blue Crayfish to add to my 45 gal.tank, since that time he has molted twice,& is now a good 4 & 1/2". I thought they molted once every 3-6 months(?). Anyhow, the past few days he has not eaten nor has he wandered around tapping his lil feet looking for food. (if music is playing it looks like he is playing the piano, lol, great fun to watch)Nor has he "gone fishing" as I call it (tried to catch fish, also very comical,But, they are to big & to fast) His head which normally was bright blue, he's gotten bluer each molt, is now slightly tinted red, almost as if you can see his blood veins. He always acts really strange for a week after a molt, which is normal.His last molt was more than 3 wks ago. The test readings of the water are as follows: pH 7.0, NO2 <0.3, NO3 10ppm, NH3NH4 0. I am very concerned about him & can't seem to find any info on sickness, just stuff about worms & such, which I see no signs of. Any information would be greatly appreciated. P.S.This is my first post since joining & I must say Great site!!!Keep up the good work. I found this site @ AquaRank, http://www.aquarank.com/index.php?p=4 Members should go & rank the site to move it up.