Greetings. I have an indoor terrarium with grow lights. It's a ten gallon terrarium with grow lights on the top. I leave the grow lights slightly off center so I have an 1.5'' gap at the top for air circulation.
I have a thermometer inside the terrarium and it says it's about 90f inside. So far, my Heliamphora minor and Cephalotus are doing fine, but my Drosera capensis 'red' isn't growing as well as it should (neither is my Drosera filiformis 'red' or Pinguicula caerulea).
I have a theory it may too warm inside. What are some methods to cool my terrarium? I tried applying wax paper against the glass sheet at the top of the terrarium to block some light and cool it down. It lowered the temperature about 5 degrees, but my Droseras didn't grow as well (they lost some dew and such because they need lots of light)
What if I remove the glass sheet at the top completely? I have a theory that the glass sheet is creating something of a greenhouse effect by keeping the infrared energy inside (much like a car with windows rolled up outside in the sun). I'm thinking about removing the glass sheet but I'm worried I would then have exposed CFL lights above the plants (and this could burn them).