I've been reserching how to take care of an octopus for a short while now. Probably about 4 to 5 months. This is by far the best site I have come across. The octopus I have in mind, like so many others, is a bimac. I've read all of the care articles on this site, and have browsed these forums and have learnt alot, even printed off alot of information which is now stapled together and has it's own folder hehe.. But I still need help. While I've found these articles and forums very helpful, everyone seems to know what everything is, and therefore they don't feel the need to explain what something is. For example, skimmers. As far as I can gather they are a type of filtration system? This is just an example, but it seems the case with alot of the equipment needed. In another thread I read that there's no point in having an eqipment checklist and there are so many different kinds of setups. Fair enough. But what are the essential things to have? And could I have a short description of what they are and do? I also have some other questions, ones that I haven't seen any info on.. they may sound silly and maybe obvious to some experienced people.. but I have never owned any sort of marine animal before. So, here goes: 1. I've read that I should do 10% water changes every week, or 20% water changes fortnightly. How often, if ever, do I need to do a full water change? This also brings me to my next question.. 2. Where do I put the octo while i'm doing a full water change? Should I just fill a container or smaller plastic tank with some water from the octo's tank and just leave it in there untill i'm done? 3. What should I use to remove the octo from the tank before i'm confident enough to use my hands? 4. I've read that after 3 months you should feed once a day. Is that one shrimp or crab once a day, or a couple once a day? And how much, and how often do I feed it when it is under 3 months old? 5. Before I put my hand in the water, should I wash my hands with anything specific or just water? 6. If I was to get a license to fish for crayfish in canals would that be a suitable food source for the octo? Every so often I will give it treats for a change, what osrt of things would you recommend? 7. May sounds silly, but can they hear? My boyfriend and I are very into music.. and like it loud. But I wouldn't want it to startle or annoy the octopus. 8. I've read about using glue on some of the larger rocks so they don't hurt the octopus by falling on them as they move them about, is it best to glue the larger rocks together or to the base of the tank? Obviously I won't glue the smaller rocks as I know they like to play with them and make little caves etc. 9. I know the minimum for a bimac is about 50 gallons, so i'll aim to get a tank that is 50-60 gallons. Thing is.. I have no idea how big tanks that hold this much water are. So if possible.. anyone with tanks these sizes, could you tell me the measurements in inches so I know how much space it will take up? Sorry for all the questions, I just want to be as educated as possible before getting an octo as a pet. And ANY other information that anyone thinks might be useful would be excellent! Also.. If anyone who thinks they could help me out would add me to msn that would be great.. I don't want to make threads everytime I have a question. I'm friendly - I promise! My msn address is firstname.lastname@example.org Thanks in advance.