Hey all. I just upgraded my tank from a 29g to a 55g. One of the pieces of equipment I was told I needed was a wet/dry filter or sump (which I am guessing they are one in the same or at least I am hoping that they are). Because of the info I received I purchased a Pro Clear Aquatics Premier 75 wet/dry filter which should be arriving to me sometime this week. What I want to know...is this something that is absolutely necessary? In addition, I have to been receiving mixed info about the bioballs. Some people say take them out while others advise me to leave them in. Not to mention reading advice stating that one can use a piece of LR in it as well. I just want to make sure that I have made a good decision in acquiring this equipment. Please advise.