Hello. I came back this week from holidays to find my 3 month old seedlings with some mold growing on their media. I removed most of it manually, but some is just too close to the plants. I've also tried to improve the flow of air in the terrarium and lower the RH from about 90 to 75. I also had a damaged light bulb, so i'll replace it with a new one (i've heard that proper lighting avoids mold).
My question is: is what I've done enough, or should i use a fungicide; and in case i do, which is a good option? another option i've considered is transplanting into new media, would that be advisable given the age of the plants?