First time poster here looking for some advice on what I might be doing wrong in caring for a couple of sundews. I have a collection of 4 different D. Capensis and a D. Aliciae. All the plants are currently kept indoors (it's still cold in upstate NY) in a converted aquarium. The humidity in the tank is around 75% with the hinged lid closed. They were initially under a shop light with a 1600 lumens sunlight bulb. A month ago I added a 16w red/blue led light as well.
Last night while I was checking on the plants, I noticed that, while still very dewy, some of the leaf tips were turning brown on some of the D. Capensis. D. Aliciae was not very dewy at all and also had what appeared to be some browning on the tips of the new growth.
I'm thinking that I may have restricted the air circulation too much in my attempt to keep the humidity up. Also, while the tank was very humid, I think I let the soil get too dry (it was still damp, but nowhere near as wet as when they first arrived from the nursery). I'm also wondering if I am giving the plants too much light too quickly.
Would any of the above errors, or any combination of the 3, cause the browning and/or lack of dew that I'm seeing? Thanks in advance for any help.