Hello everyone! My name is Ashley and I've just recently become interested in keeping an octopus as a pet. I began my research online, looking if it was indeed possible to keep them as pets, as well as looking as to where I can buy one, and as to what living conditions would be best for the octopus. After a while I stumbled upon this website, boy has it helped answer most of my questions! I've looked all throughout this website and finally decided that I'm going to try my best to obtain a Bimac octopus. I do have many questions though that I hope someone can help me by answering them: 1. How can you tell the difference between a male & female octopus? 2. Is a 75 gallon tank a decent size for a Bimac? 3. How big do Bimacs generally get? 4. What do you recommend is the best to get for the tank? IE. Filter, sand, rocks, coral, other living creatures. 5. Are there things that I can buy from my local pet store, or anywhere that can help me maintain my nitrate, nitrite, copper, etc. levels? 6. What is a complete list of all that I would need? I'm pretty sure I have everything, but I would like to just get a second, third, fourth opinion. Thank you so much for reading this and answering my questions(if you do). I was also wondering if it was possible to include the estimated amount of what some of these materials for the tank and what not will cost. Money is not a problem and I would appreciate to know the best of the best of what to get. Once again thank you all so much for helping me with this! :) -Ashley.