Hello I'm Matt, a saltwater keeper from the Pacific Northwest. I have kept reef tanks for many years and am thinking I would like to try something different with the new 150g acrylic tank I just picked up. I have always been fascinated with Cephalopods but have always resisted keeping them due to their short life spans and also not wanting to give up my reef tank to have a solo octopus. We are in our own house now, so 2 tanks is an option which will allow me to have my cake and eat it too! I do have a few questions that will help me determine my best options. Is a 150 gallon tank over sized for keeping an Octopus? I know this will depend on species, something I have no clue about the differences of yet, but I am reading in my free time about this. As a general rule though for the species readily available in the industry is a larger tank always better? I have the option of transferring the contents of my 40 breeder reef tank into the 150 and keeping the octopus in the 40 breeder. I know that whichever tank I use needs to have a tight lid, and no way for it to get down into the sump which will not be an issue with either tank, but the 150 might be a bit easier in that department. I have a large Reef Octopus Cone skimmer, reactors for carbon and any other media I will need, and I run filter socks. Is there any other means of filtration that an Octopus tank would need, or that would be better? Being that I am in the PNW I am lucky to have Coldwater Marine Aquatics local to me and am wondering if the addition of a chiller to keep cold water species they could get for me would be a good idea? I seem to remember (I mat be wrong?) that cold water species have a longer life span and do well in captivity? This would also allow me to keep some of the beautiful cold water anemone's and plant life found here along the coast. My final question is in regards to lighting. Is subdued lighting better or does it not matter? The tank came with a 8x54w ATI Powermodule which puts out a ton of light and the 40 breeder I have has a similar T-5 fixture, would I be better off going with a less powerful light for an Octopus tank? Thank you for taking the time to read through this and any advice/help would be awesome! I look forward to doing as much reading as I can and learning all I can. Thanks.