First grow - help identifying possible issue(s)

First time grower. Indoor autoflowers. 2x4 tent with mars hydro tsl 2000 light. 2 critical mass, 2 blueberry and 2 gelato. Week 5 from sprout.

Layered soil grow. Bottom 1/3 is FFOF with perlite, EWC and Dr Earth. Top 2/3 is FFHF and perlite. Watering with ph’d to 6.5ish city tap water. 18/6 schedule and DLI set to around 40. Temps 66 lights off and 72-74 lights on. RH b/w 60-70%.

Recently noticed these yellowing of leaves. since the yellowing is not all on the bottom leaves but here and there among the plant I am thinking either a calcium or magnesium deficiency but this is my first run so nothing to compare against.

Any and all help is appreciated!

Looks like too much nutrients. Have you checked you run off ppm/ec? When it’s time to water Id run a couple gallons of plain water through the pot then a gallon of 1/2 strength nutrients.

93OG said:

Looks like too much nutrients. Have you checked you run off ppm/ec? When it’s time to water Id run a couple gallons of plain water through the pot then a gallon of 1/2 strength nutrients.

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Im not feeding any liquid nutes.

I have not checked ppm/ec of runoff.

You took an already nurtrient rich soil ocean forest and added more to it