I currently have a 60 gallon, hexagonal saltwater tank and a 55 gallon rectangular freshwater tank. The 60 gallon tank has been running with fish in it for at least 6 months, the freshwater tank for almost 3 years. The Saltwater contains: 1 Blue/Hippo Tang (about 4 inches) 1 Ocellaris Clownfish 1 Yellowtail damselfish 1 Cleaner Shrimp 2 serpent stars Several hermit crabs and Nassarius snails. About 15 pounds of live rock (i'm not totally sure) The Freshwater contains: 4 Tiger Barbs 1 Blue Gourami (female) 3 Goldfish 1 Plecostamus After visiting the Georgia Aquarium on our way home from Florida my desire for a reef tank (or a Fish Only with Live Rock tank) as been charged to full capacity. I have been reading my FAMA magazines from past months and I am having a hard time on deciding whether I want to transfer the Saltwater stuff to the 55 gallon aquarium, then the Freshwater stuff into the 60 gallon. Both tanks have the same filtration systems, with the exception of a UV sterilizer for the Saltwater and both have a heater. The Saltwater tank also is able to have more light bulbs (it has 3 the other has 2). But the Freshwater tank is longer, shorter, and has more surface area for gas exchange. Some possibilities I thought I could do: 1. Switch them like I originally proposed 2. Move the Saltwater fish to the 55 gallon, use both filtration systems for it (of course transfering the sand, rock, etc.) Then sell the 60 gallon aquarium to supply funds for the new stock I will be getting. 3. Same plan as above, but keep the 60 gallon aquarium and use it as a sump? Some new fish that I have been thinking about getting are: 1 Yellow Tang 1 Coral Beauty Angelfish (definitely want this) 3-5 Chromises 2 Three/Four-Striped Damselfish (not entirely sure about these) 1 or 2 Firefish I won't have many corals either. I will only pick the most hardy kind that can withstand low-medium light conditions. The light bulbs in both tanks are 15 watt bulbs. Some finals words: I will not have a problem finding a home for the freshwater fish as our fish store will take them and give us credit for any future purchases. To help with cycling, I will transfer at least half of the water currently in the Saltwater tank into the 55 gallon one. I know for sure I will have to replace the lighting. And I need to buy a good protein skimmer to boot. So, my dilemma? Which possibility should I go with while keeping in mind what I presently have and what I will (hopefully) have in the future? As stated before, I have magazines from Freshwater and Marine Aquarium which have been very helpful, and I have also visited fishchannel.com for some advice. Thank you for taking the time to read this, I know it's a lot. I hope I gave enough information without jumbling it all around. If there is something you don't understand or some other information you would like to know, just ask.