A week and a half ago I upgraded my 75 gallon to a 125 gallon since I couldn't pass up the deal I got on the 125 tank and stand. It took all day but everything moved over smoothly. I made one big mistake, when replacing the substrate since I wanted a larger grain size I used live sand and had an ammonia spike from the die-off. Luckily nothing was lost, although I thought my anemone was a goner at one point. I'm waiting for the diatom bloom to end, and still working on getting rid of some micro-bubbles. Pictures below.