Originally Posted by King Supra
The nem seems to be happy and healthy but then again I don't know much about RBTA this is my first one and it's quite huge in my opinion it only seems to want to eat 2 times a week any more than that and it spits out the food eventually
Then there's your answer. No more than that of course, and very small bits- like pea sized or smaller.
When anemones spread wide they are increasing surface area, so to absorb more light. Depending on how far it is from the fixture might be a factor as well. If it's at the top 1/3 of the tank it would make it's odds of surviving better. Which Orbit fixture do you have exactly?