All four of my giant ecosystem vivariums have become one with the building of a new glass bridge that connects Verdantia, my Grasslands Vivarium, which was formerly a solo tank, to PANTGEA, my superbiome of three other tanks. The glass bridge took months of planning and features a surprise addition to its design. I couldn't wait to watch what animals would migrate to new lands, but funny enough, in the end things didn't quite happen how I thought they might.