Athosanswered grow question 5 years ago there's a couple of reasons your seedling isnt growing as fast as you would like. Number one, temperature below 23°C (73°F) will slow down growth a lot. Number two, Since you are using a pot so big for the stage of development it is now, you are over watering; for example, 200 cc of water should last the seedling 4 to 5 days easily and you are giving them more than that daily and so the roots are literally drowning and can't uptake oxygen. Both reasons combined will keep the growth rate to a snail pace.