Anemones are NOT filter feeders. They are photosynthetic, which means they need strong lighting. They absorb the light and turn it into energy. Anemones are also carnivores... eating small fish and what not. Scalops, shrimp, silversides, etc are good food for anemones, but they are by no means substitue for good lighting. 2.5w per gallon and you'll have a chance... but shoot for 4w per gallon... assuming everything else is in order.