It's the oddball out of the three since it likes pretty wet conditions. With the cooling fan, be careful it doesn't dry out the air. Genlisea can get very unhappy with humidity drops.
U. reniformis is actually a pretty durable plant and doesn't really *need* the temperature drop as long as it doesn't get unreasonably warm, while U. alpina is very tolerant as far as other members of the section go so you don't need to rush.
I'm don't have a lot of experience with the sect. Orchidioides utrics but they seem to be yellow when the moisture level isn't right, when they don't have enough light, or are suffering from nutrient deficiencies. Putting a smidge of peat in the mix definitely greened up my U. reniformis, but I'd be hesitant to do the same for U. alpina.
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