Turbo twists dont work, is what i was told!!! tHe most reputable Type of UV is Aqua Ultraviolet... Put it this way --I had A Ich Wipeout in my 125--- then i got a uv and im doing alot better because i have some of the most prone to ich fish.
Remember You must choose the rite size uV.. You have to go according to the flow of the water pump..... You do not want to push the water to fast or too slow through...Or The UV will be Useless..And remeber the speed you push the water at is Huge depending on what you want to do---To DimInish Ich (protozoa)--go slow---- Algea Go faster--- Theres a bunch of chats to help