On Thursday I noticed that my D. callistos flower stalks had aphids. I snipped and flushed them. Now I have had success in ridding my D. capensis, D. adela,and D. spatulata of aphids by drowning, but now I am not sure if they are just migrating to different plants in the collection. People have suggested Orthene as a better alternative to drowning and I picked up Orthenex at Home Depot. I read the instructions and ingredients. I didn't see Orthene listed and it suggested not using on indoor plants. Has anyone used this product before?