Thanks for visiting! TONMO is the world's greatest online cephalopod enthusiast community, with interactive content going back to May of 2000, and a biennial conference. If you'd like to join in on the fun, become a TONMO member -- it's easy and free. You can follow us on Facebook and Twitter for more cephy goodness.
What was your ammonia at? What kind of octo and how big? His behavior could be related to senescence, though it could also be water quality related. Keep offering a variety of LIVE foods, once he starts eating you can try frozen. Offer the food with a feeding stick or with your hand and make sure your octopus sees it and recognizes it as food. I hope he makes it.
my nh3 level were between .50 and 1.0 ppm. i did a 15g water change last night and left 2 very small fiddler crabs in the tank.today i checked my nh3 level and they were fine.i also found the remains of the crabs scattered about the opening of his hole.so i think everything is ok,but i have not seen him yet tonight.