Salt water tanks are very expensive to set up and maintain compared to fresh water, but are a lot more rewarding. I'm same as you only has my tank a few months but bought second hand after it had been set up for 3 years so cheated abit. I no the light has to be upgraded, need at least 2 power heads, uv steriliser, protein skimmer and a good filter. Get as much live rock as you can.