Hey Growmie,
I normally mist the sprout twice a day once it's above the soil, on its 4th day I give it 250 ml of I use this measurement for watering/feeding until about Week 5/6 then I go up to 500 ml. I do this to prevent overwatering, remember only to water when you pick up your pot and it's very light.
Hopefully, this was helpful and remember ..."Happy Growing" and "Free your mind one puff at a time".