I’m starting up a zoa garden on the side of my nano and I’m quite confused about a particular frag. It’s not even an inch away from the others, but while the others are thriving, this ones barely hanging on. Only thing I can think of is too much light? The zoas behind it at the back are partially shaded by the power head while the one in front is angled more away from the light. Nothing else I could think of that could be causing it. Any advice would be appreciated.