Hydroponics with cocopeat containers

[leeds78]

Hi,

I'm new to the forum as well Hydroponics, I'm trying to grow tomatoes in coco peat containers,. tomatoes trees are grown but it more than 3 weeks still small trees 4 inches.

what I'm doing is poring nutrients every 2 days, but no enough sunlight,

some time I see fungus in coco peat why is that,

kindly advice.

Thanks.