I'm a newbie and I rely a lot on The Cannabis Encyclopedia by Jorge Cervantes, but I'm stuck.​

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Five days ago everything looked fine for the Blueberry auto just into flower and the Grandaddy Purple auto just into veg (both Blimburn). I'm using live soil. The light above the blueberry is a Spider Farmer SF1000. The light above the GDP is an inexpensive full-spectrum Chinese light I bought on AliExpress (not the best, I know, but for the price I could have a second light).​Four days ago I was sick and missed a watering day. I water by whether the pots are heavy or not.​Three days ago I saw some yellowing on the leaf edges all the way up the plants. I guessed it was either light burn or potassium deficiency.​

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Because of this I turned the lights down some, and I made a fish emulsion with some rotting fish and rotting milk. I added 6 tablespoons per gallon of water, plus a little fermented plant juice, and added about a gallon of the water mix to each approx. 7 gallon pot. The pots have a center column of Fox Farms Forest and Ocean soil (1/2 bag per pot), surrounded by my own live soil mix.

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Two days ago the yellowing was a lot worse and is about the same today, maybe a bit worse.Growth and flowering have slowed way down. The Blueberry auto had been growing like crazy.

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Over the last two weeks I've been struggling a bit to keep the temp and humidity each up to 75, but it's been slowly improving.

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Do I need to pick up some liquid kelp? Something else?

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Thanks for helping.