Well, being a dumnamerican; I don't know what 23 celsius is without going to a converter.

Temp needs to be 80-90 degrees fahrenheit.

What is the humidity level in the room? Possibly you are getting a mold or mildew due to colder damp environment, but without pictures, anything suggested here is mere guesswork at best.
bitemybud Reviewed by bitemybud on . First time indoor grower!! New help,, please As i said it I am a first time indoor grower, and I am a bit confused at what my clone is doing. First off I am growing in a drip system hydro setup with a 240w 7 band led and i have 1 clone and 5 seedlings about 3 1/2 in tall. with that said, my grow room stays at about 23 degrees Celsius day through night. Ok well my problem is that the larger 2 leaves on my clone keep getting this white film on the top side of them, and i wasnt sure if this was a problem that i was doing or if it was some Rating: 5