Thank you Scott. I just changed my lighting, and 3 days later it split for the first time ever, I'm worried it is stressed out but it hasn't gone into hiding. It moved up the back of my tank into a high flow area, then split after the 3rd day. It was eating normally through yesterday, I didn't try to feed it this morning because the halves are still trying to re-position themselves, and I think one of the halves is dividing again! Would you be worried if all water params are acceptable, and the only change was the lighting?