So I've been reading up on TONMO for about a month before I finally decided to register. I'm getting a 90-gal acrylic tank from glasscages.com and building the stand/canopy myself. I haven't kept a saltwater tank before but I know what it entails after reading pretty much every word posted on this site. This is sort of a "let me get this straight" thread. I'm just wondering what kind of equipment I would need to keep a bimac. 1. I'm ordering a 48" x 18" x 25" tank (90-gal) so what kind of filtration should I use? 2. Would I be fine using an emperor 400 power filter (which has an 80-gal max) if I used 100% live sand and sufficient live rock? 3. How much live rock in a 90-gal is enough? 4. Can I keep the external canister filter, heater, and protein skimmer all in the tank without having to build a sump? I don't have the tools to create my own sump or wet/dry filter, nor have I done anything like that before. And I think I'm going to keep 1" very fine live sand, which is what was recommended. Is this a sufficient depth of sand for a bimac? One site said fine sand because coarse sand can damage the octopus' tentacles, another said medium to coarse sand is what they enjoy... I'm not sure what to believe, so I'll be safe and go for fine sand. Then we've got the heater, and I'll need to get a protein skimmer, and I hear they like "actinide" light or something? Anything else I forgot? And yes I promise I'll fully cycle this tank for three months before I even order my bimac. Oh and if you can recommend any good brands for the protein skimmer or light strip, it'd be much appreciated.