what does brownish spots mean?

Hello guys im a noob at growing and i need help. What does the brownish spots mean?

This is a soil growth about 3 and a half weeks old with fox farms soil, and four 26w CFL lights at 18 hours on and 6 hours off.

i think its because of heat but i have two air filters going on high and the temp stays around 80 degrees.

It could be a ph problem. It could be nutrient burn which means to much nutes to fast. It could be the light is to close.

uhh that all is on the spot if its gotten worse flush ur pot with alot of water
if thats doesnt fix ur missing a key ingrediant i cant think of its name
but i dont think thats a burn it looks like its missing something

but dont ADD ANYTHING TIM U FIND OUT WHAT IT IS

i always water it with water from my fish tank which it's always at a ph of 7. i have my CFL's 5 inches from the top of the plant. i havent given any nutes yet. maybe the soil has to much nutes?

do fish live in your fish tank? Maybe fish waste and micro fish food particles are being watered into the plant and is harming it

Toua said:

i always water it with water from my fish tank which it's always at a ph of 7. i have my CFL's 5 inches from the top of the plant. i havent given any nutes yet. maybe the soil has to much nutes?

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early signs of nute burn. flush them out and after a week re-pot them in a nuetral potting mix and control the nutes yourself.