Tank looks great. Sometimes when the polys are in a new tank they can take a while to eat and adjust. Would not force feed. As this reinforces it to not look for food on its own.
would agree with this. They like to hide, but I would remove some of the rocks out from the left side of the tank. That way the polys have more room to turn around and rest on the sand if they choose to. Can’t tell how wide the sand pit is though....Maybe need to clear some floor space, hard to find food when there is alot of rocks, this guys loves floor space and feed them when lights are off, they usually slow on getting to the food cause they use smell and they are basiclly blind.