Quote Originally Posted by tevfik
If this is the one you're using right now, adding fertilizers is not a good idea at all!
Usually this type of composts are not recommended with seedlings or very young plants. This compost has already high level of nutrients and you must be really careful with that. I used the same type of soil with my two plants from the seed, currently growing. But I was always giving only deionized water to them.

Let the soil dry out before watering. You have small plants in big pots. They can't drink all in two days IMO. Use distilled or deionized water if possible. If not, let the water from tap sit for a day.
Flushing with correct PH water also can be a good idea for now.
Do you have good drainage? Did you press the soil? These are also important.
Next time add some perlite in your compost. Or sth similar to help air/drainage.

Place your bulbs horizontal if possible, more light can be used by plants.

These are all i can tell. Hope these helps.
yes thats the one i have used, i have not watered them since i will let them dry out now, they are looking a little healthier in the new leaves now, i am awaiting a ph reader in post and have bought some perlite today also and a humidity meter