hello all; i am a soon to be octopus owner, and am in the process of building my new species only tank for my new little friend. i am looking for pointers and any other relevant information about these intresting creatures and their needs. i have a been a reefer for the last 4 years and currently have a 90 gal reef with a 20 gal sum refugium, a 75 gal frag tank, and a 20 gal qt tank. what i have so far is my drilled 65 tank i have 3/4 locline with a duck bill on the end for my return, and an overflow box. i have a tight fitting piece pf plexi for the top of the tank which sits on the top of the overflow box. i have not decided if i should cut slits, or drill holes in the box to allow water in, if holes what size is best to keep it in? i will have about 50 lbs of liverock doweled and glued together in the tank and another 20 in the sump/refugium. and a 2-3" fine rinsed argonite substrate in the tank and 2-3" coarse in the refugium. do i need any powerheads? if so how much in a 65? the sump is a 40 gal tank with chambers the first chamber will have a 200 micron filter sock and then 4gal of bioballs whick will be rinsed 2x a week, and sock will be changed monthly of bi monthly as needed. next chamber will house the skimmer, which is rated for 160 gal. next chamber is a 17 gal refugium, which will have some red grape algae to keep the nitrates down i may keep some ornamental macroalgae in the display also. i may also find a peacock mantis to put in the refuge, since the stand will display the refugium. and the last chamber will house the 150 watt heater, the auto top off from my rodi and a mag 9 return pump. will the octo be able to taste the peacock if its in the sump? would that stress it out? my lighting will be 2 24 watt led strip lights for day on 10 hours and fior night 12 watt red led for night viewing, and a screw in type compact flourescent bulb for the refuge on when display lights are off. The tank will sit in my basement where there is little to no outside light to mess with the light cycle. at the moment i have almost everything i need except the return pump, the substrate and the stand is slowly being built at my leisure. i would love to hear feedback on what you all think. at this point you all have more expiriance than me. it would be greatly appreciated.