I just got an open brain (Trachyphyllia geoffroyi) in my 90.
I know this has been discussed before but I'm having a real problem feeding him.
So far my only success has been putting a cut-off 2l coke bottle over it and simply dropping brine shrimp from a baster into the neck of the bottle which kind of showers down over it.
Most other ways I try result in the food drifting off or being eaten by my brittle star, snails or cleaner shrimp. I've watched after dark and seen tiny tentacles around the edge of the brain (around 3mm long) - surely these can't be the feeding tntacles?? How the hell do these things get along in the wild, it seems mighty hit and miss hoping for a tasty morsel to fall onto the mouths before being devoured by other hungry critters??
Or am I just trying to hard with the critter???