hi everyone im making the big jump from all fish to reef. My local store has been good so far got a jbj 150 watt hqi light for 200 bucks but he was telling me i need to change filtration. I have a 42 gallon oceanic hex tank with a fluval 304 on it. he is telling me to run a reef to go with an eheim 2227 wet dry filter. Other then the small wet/dry part on the side of the eheim i don't see any difference in filters especially nothing worth 200+ bucks. So is my fluval ok also if it is what filtration chemicals should i put in the 3 baskets. I would assume charcole in one and some kind of nitrate remover in the second? Any advice ,recommendations, or explanations are welcome also i can post pictures if needed