Hello Everybody, I am fairly new to Saltwater tanks (Tank is 5 months old) and extremely new to Octopuses bought one from (Roozen) LFS in Md about 6 hours ago. We named him AhKee. The LFS told me he is a "Common O. from Indonesia". This initial post is looking like its going to be long so I will ask my questions up front and then type out a lot of background info for those who would like to read it! 2 questions: 1. Ahkee INKED a whole lot 4 or 5 times before turning Bright Red and sitting on the glass at the front of the tank. Is this normal? 2. I understand I need a protein skimmer, can anyone recommend which skimmer is best for my 55g corner Hex aquarium? I have spent the last 5 hours reading information on what I have just gotten myself into and I could use some help ! I had the typical LFS intro about "...oh this little guy could stay in a 20g tank blah blah blah..don't let him ink, if he inks to much he will mess up the balance of the tank and kill himself", but when I got him home to my 55g tank and put him in he shot some "Ink" and swam behind some rocks into a cave I built him! Ahkee found some cracks in the cave and started exploring the tank where he shot ink like 4 or 5 more times and swam around very aggressively and quickly before stretching out and showing me that he is not so little! I would say his tentacle length is probably about 8 inches when sitting still and when he stretched out he was huge seemingly longer than 2 feet! His head is in between the size of a golf ball and a tennis ball! He didn't look this big at the LFS. When I released him from the "Jar and Bag" set up he just went " I mean he is huge! I will post some pictures of AhKee later today! Before I put him in I ran a full water test and the Ph was 8.2; ammonia 0; Nitrate 0; Nitrite 0; Specific gravity 1.026. I have a cascade 1000 filter with 50lbs of live sand and 30lbs of live rock. This was running as a reef aquarium for the last 5 months and was home to 10 Hermits, 7 emeralds, 2 yellowtail damsels and 1 sand sifting star. The temp of the tank was 80.4 when I started but after reading the Nancy Care Sheet I'm letting the temp come down slowly to the lower 70's! I have done a 10% water change because of the ink! Any recommendations would be greatly appreciated! Thanx!!!