Hi Bosimao,
You can start planting even before you fill the tank with water.
You mention you are using 36W PL light 10K, but how many bulbs? If only 1 you lighting is definitely too low for your 3ft tank if you want to grow plants.
Try to provide more information as requested by SurWrathful and read as many related articles as you can. You can try the following website:
http://www.thekrib.com/Plants/
You can start planting even before you fill the tank with water.
You mention you are using 36W PL light 10K, but how many bulbs? If only 1 you lighting is definitely too low for your 3ft tank if you want to grow plants.
Try to provide more information as requested by SurWrathful and read as many related articles as you can. You can try the following website:
http://www.thekrib.com/Plants/
