Wow, that tank looks GREAT!!!! I have a 39 gallon that I think I will switch over to a 40b. I like that tank. I have battled flatworms also. I sucked as many as I could out with an 1/8" tube then treated with Flatworm RX. I have done this 3 times and still have them hanging out. I have never had too many in there but I would like them gone. I will be doing another treatment today. Hopefully this time does the trick.