fish emulsion 5-1-1......there is your issue

that is very acidic and since you dont have a ph meter Ill assume you didnt ph correct the ferts to the optimum 6.5-6.8 range before you fed them

this has thrown off your ph and causing the issues
a PH pen/meter is best but I also recommend an aquarium chemy test kit as a backup, the pens need calibration & calibration fluids

bad PH prevents the nutrients from being available, everything that goes in the pots needs to be ph corrected to the optimum zone 6.5 6.8 so that the nutrients will be available


complete a soil runoff PH test.......
with PH corrected water (6.5-6.8PH ) pour enough water in the pots so the water runs out the bottom of the pot ...collect & test the PH of this runoff water....

If the PH reading is out of optimum range 6.5-6.8 PH, you need to flush your plant.
Flush with PH corrected water, till in optimum PH range, 3 times the volume of the pots is the rule of thumb but may require much more flushing if the rootball is thick & sour
EG: 1 gal pot = 3 gal. flush

add 1/2 strength nutes to the last gallon of the flush.