hi um my brother had just gotten an octopus bireas(sp) and the tank is a 2 gallon.He then is getting a 29 gallon for the octopus.But when we moved the octopus to the blue 10 gallon tub ,which has 4 years of live sand in it and a few live rocks that have been going for 7 years.and my dads water which has just had a 30% water change but after the second day it has lost its appetite and it has lost its tentacles,he was about 8-10 inches from mantle to tips of tentacle and now he is only 5-6 inches.he has plenty of shrimp with him so he wont starve.he also looks white all of the time not to mention he is more attentive and looks terrified.Can someone please help with the situation.
also he has no tank mates besides a few shrimp
also he has no tank mates besides a few shrimp