I need help!

i have a couple of plants, one is thriving, the other is doin even better then that one, but it is gettin small little circles on the first set of actual leaves they are probably four weeks out of seeds, the larger one was germinated in paper towels and transplanted,the other is all natural i just used miracle gro pottin soil, i had them in a small plastic pots, but then got two 6 or 7 gallon pots i think. and transplanted both, they are growing sets of four with three large leaves and 1 small, and sets of 5 are all ready coming from middle on the bigger plant. possibly starting veggie. what can i do for the spots on the lowest leaves? (not the ones that first come from seed, but the next set of 2) WHAT TO DO?

ahhh shit any good types of soil to use or mixtures to make with soil,? and would it be good to transplant now?

what kind of hydro set up do you have ive always been curious about them, but never tried it

dont listen to that shit about miracle gro, im using it and having no problems at all, theres been test done by members on this site that show miracle grow can out perform fox farms soil. Look at this chart and look at this website, might help you clear things up or alteast get on the right track
https://www.rollitup.org/newbie-central/373397-test-progress-miracle-grow-soil.html

http://www.mandalaseeds.com/Guides/Marijuana-Nutrient-Problems
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thanks man for the chart yea it seems that i have a potassium problem. do you know any thing to help with potassium deficiencies?