yes before i added my octo i had a SG of right inbetween 1.025 and 1.026 and is still there. pH is 8.2, maybe even 8.3. No copper shows on 2 different kinds of test kits, and no trace on my polyfilter. Nitrite and ammonia are absolutely 0. i really don't know whats wrong. i'm familiar with saltwater tanks now for about 3 years and have never had a problem. I'm going to college to even become a marine biologist, not that, that makes me any better but im lost with this one.
i have tried feeding it more ghost shrimp, krill, sea scallops, chopped up large clam, baby clams from fishsupply, and i have 10 hermit crabs in the tank and none are eatn, and even silversides. when i try and feed him he feels the food, but doesn't take it. when i five him live ghost shrimp or live feeder guppies on my stick he will take those and then he holds it for about 1 or 2 minutes and then releases it, without out eating any of it. i observed him yesterday when a hermit crab crawls right infront of him, he uses a tentacle to push it away from him. I'm worried for the little guy.