I have never left the hobby, been at it for almost 10 years with our small acquarium. However, during that time I was just plugging away running my system and doing water changes. I have not been paying attention to how technology is changing the hobby. Had not even been thinking about it. I was pretty shocked and enthused about some of the things I have found out about in the last couple weeks as I start rethinking this whole thing. Two things that stand out to me are led lights that can set up a complete solar and lunar cycle with a couple clicks. Wave generators that can set patterns in your tank resembling natural ocean currents. So much more that I had no idea existed. I started looking around because I wanted to upsize our tank from a 35 gallon to something in the range of 80 to 100.