sun coral is doing ok, nothing to be proud of though as this time of the year Im not home enough to feed it daily or even every other. The feeder works good, the tube is for food and I inject it via pipet. My problem is that I cant use the feeder unless the coral is out in the open on the substrate but if I leave it there then it could be bleeched by the lights. It's an awesome coral but it's just too demanding for me lately, hopefully I can take better care of it now that the holiday season is winding down.