ok so I get my live rock tommarow 3April. I was woundering, when I do the initial rinse off to get the critters off, which ones should i Keep? What do they look like? Question #2 I keep hearing of there will be a big spike and everything, when this happens, should I treat it, or just let it run its course? And finally I have a Marineland Pinguine 350 filter for my 30g. It has 2 additional slots for filter midea, What would you suggest to use for those and should i go ahead and put them in now to cure the live rock or wait? Thank you for your time and help.