Yellow/rust spots middle of the plant

Okay, I want to say that you will not see benefits this grow, you are to far along to see any changes at this point, with that said I would stop the fish shit and recharge and water only.
Can you water to slight runoff and check the ph and ppm of the soil?
I’ll check next watering, how long you go before too feeding with the 3.0?
 
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