Hello everybody! I am a first-time ceph owner and I just got my juvenile Indonesian Long-Arm octopus. He is currently acclimating beside me, a little stressed but occasionally moving about and changing color. His name is Elvis and he'll be living in a 29G BioCube AIO with a Tunze 9002 and various macroalgaes. Right now he is very small, the mantle is about 3/4" and tentacles 3" or so. The tank has been up for 3 weeks and water quality is very good. 0 ammonia and nitrites, .2 nitrates, pH 8.4, SG 1.026. The tank is sealed tightly and the lid has books on it to prevent escape. The return has mesh over it so he can't get into the pump. Currently there are nerite and turbo snails in the tank, as well as 2 peppermint shrimp, to provide food. There is also a sixline wrasse which I am attempting to catch and remove. Plenty of hiding spaces and caves in the rocks as well. Any advice is appreciated, please be kind! I am so excited to embark on the journey of caring for such an intelligent animal!