I have a 30g long with the stand and canopy, and plenty of eggcrate to go 'round. I want to make this either a seahorse tank or an octo tank. I am a year into saltwater, and on my local groups site (www.maast.org) I have over 2500 posts in almost a year. So yes, I do have much time to read, and I have. I have a 75g with a 29g fugeish/sump with a EuroReef RS135 and some 250w HQI halides..... Yeah, so that's my background so far. I have a boatload of questions. Specie: 1.) What is an acceptable breed of octo to keep in this small of an aquarium? 2.) What do those breeds eat? 3.) Are they readily available, hardy, and where can I find them (prefer captive bred) 4.) Which of these have the best coloration? :) 5.) Can these be mated? Housing: 1.) What "rules of thumb" or "gems" can y'all offer me about housing an octo? 2.) How small of a space can an octo get out of? 3.) Will a simple dual biowheel work, or should I build a fuge/sump? 4.) How much Live Rock should I use? 5.) Can I keep corals in the same tank, or would that be a bad choice? 6.) If I only housed an octo, and since I am diligent on HEAVY water changes, will I really need a skimmer? 7.) What SG is required, and is 1.023-4 acceptable? 8.) What is a typical temperature to keep them at?