It ll probably be about 6months before I can actually start working on my octo tank. but this is what I have in mind so far. all comments, tips and tricks are most welcome. first the place of my aquarium: I had a place in mind in my livingroom. after measuring, I could put a tank of 80cm to 60 to 60 which would be around 70 gallons. Since I'm planning to keep O. vulgaris or cyanea, I don't know if this is big enough? Filtration: I have an old tank of 65cm to 50 to 50 (around 40 gallons) which acted as RO water reservoir. I'm thinking of turning that into a trickle filter. beside this, I'm also gonna install a canisterfilter with active carbon. What do you guys think of this setup so far? I know I'll also have to install a skimmer but I don't really know much about these, so any tips on what is commonly used would be appreciated. decoration: now this I've done before!!!! at least in freshwater. I was thinking of making a background with polyurethanefoam and press pieces of tufarock and oystershells in it to give it a natural look. In front of that I can place some liverock and tufa to create caves and holes. these are the basics I had in mind. now take your chance and spill your guts. what's wrong and up for improvement in my plans?