I currently have a 20 gallon long tank with live sand, live rock, an API hang on back filter with carbon and little plastic rods for filtration, Aqua C Nano Remora protein skimmer, and Current USA Pro T5HO 10k/460nm actinics set for 8 hours a day. I have 1 Coral Beauty, 1 Ocellaris Clown, 1 Six Line Wrasse, 1 Firefish, and 1 Bicolor Blenny. There are 2 XL Turbo Snails and five or six small hermit crabs. I also now have a Condylactis Anemone. My ammonia levels have been stable for about 3 months now. In fact all levels have been stable for a long time, with the only exception being that my ammonia was at 0.5 ppm (I think that is the right ratio) about 3 months ago. That was when I stopped feeding every day. I have always fed them frozen brine shrimp, thawed and applied with a baster. I now feed them every 2-3 days, but I worry that the anemone is not getting enough to eat. I do no water changes. All I do is top off as needed with RO water, and my salinity and other levels remain stable. I occasionally get some short green growth on the live rock in very small patches. It is not really hair algae, but more of a short turf looking growth that comes and goes. I have combated this by changing my carbon every three weeks instead of 4-6, and frequently emptying the skimmer cup.
I have found a 55 gallon tank with a nice stand and canopy, sump/filtration system with bioballs, overflow/topoff system, power heads, test kits, refractometer, a mag float, and an Eheim gravel vacuum, all for $250. I am trying to get down and pick it up this week so I can start getting it ready. I have a spot picked out for it and I just need to figure out the sand and rock situation. I have some extra dry rock stored in the garage that I can reintroduce as base rock for my current live rock. I will probably just buy some premade salt water at the LFS and I can always buy new sand. My main questions are:
What else do I need that I am not thinkng of?
Do I need to seed the new sand?
Do I need to let the new tank cycle before transferring livestock?
If so, how long does it take, or do I just test regularly until it levels out?
I have been told that there is no need to seed or cycle the new tank, and to just transfer everything over the same day after acclimating livestock. I have also been told that there will be a new cycle for the new tank and I will need to let it be for a few months before making the transfer. Obviously, I am confused by the conflicting advice and just want some more input from people to figure out which is going to work best for me. I am completely open to rehoming fish that are going to be too crowded in either setup, so that is not an issue. I mainly just want a nice looking tank that is not harmful or stressful to the inhabitants.