Hello all.. I'm from the reef side and I have never kept a Octo.. but after reading and looking at pics.. i have become somewhat inspired.. my question is.. I have an old 35 gallon all glass tank.. What would i need to make an octo tank (lighting? rock? substrate? filtration?) Also is there any octos ppl recommend? and are any of them not nocturnal? I dont' wanna do a slipshod job and kill the octo.. so i wanna make fully sure that i'm prepared to take on something like this.. thanks in advance