Athosanswered grow question 6 years ago Although your temperatures could be a degree or two higher, it is not that. Your problem is that the plant is in a pot too big for its current size and you end up over watering and so the seedling is drowning in water, unable to uptake oxygen. This is why it is so important to start in party cups and transplant when the current pot becomes too small for the plant size. At that stage a cup of water (200 cc or 7 oz) is more that enough for 5 days or so. Let it be and no more water, what you have poured into the pot will last weeks, once the media has sufficiently dry, growth will resume.
If you are unsure, you can tell by the curled edges and the puffiness between the veins in the leaves, classic over watering symptoms. Not that you need to look at the pictures, just telling us that it is receiving 2 liters every other day is enough. Good luck, we all made that mistake when we began to grow.