Using what soil?
Any added thing eg : 5elements etc? It happen to my glosso where i create a river look using white sand at the middle. Those glosso on the river looks pale n whitish while glosso on soil looks great. It may because lack of additive.

doesnt look like soil....more like gravel or sand, coz usually, planted tank cannot use undergravel filter... but this one recommends it...

u can try dose liquid ferts if u want...

btw HC is quite demanding... are u sure u given enough light/CO2

HC = dwarf baby tear...im assuming thats what ure planting....issit?

should be low tech planted tank..should be...huhu
trim! trim! 
lol...same as mine..i guess u didnt use 5 element. although mine with 5 element, the soil still lack of nutrient that planted plant need. my moss do well, but my hairgrass...erk...slow from what i expected. even the color is pale. better use amazonia next time. just my 2 cent 

How many u need?