i have an empty 55g tank im planning to stock with a lionfish and a green wolf eel. id also like to have some live rock to provide hiding spaces for my lion and eel but i need some advice on what kind of filtration to use. origionally i was going to use a penguin 330 with a bio wheel and an in-tank protien skimmer. would that be sufficiant? or what about just a wet/dry trickle filter with a built in protien skimmer? i have another succesfull 55g with a wet/dry but it was a lot of money. so im looking for alternatives. thanx for any help