Ok , so now we are even , we will behave from now on.
So yea , could have been the nutrients , though the fish should have given it a lovely green , as its high in nitrogen and organic , if the dose was right , it would probably not damage the plant
The ph on the other hand could cause lots of problems , like nutrient lockout...
You can try to adjust the ph ,of your water... below 7 if poss )
Or if you werent working with potting soil i would tell you to do a flush or 2 times with ph adjusted water ,
Only problem is without the upgraded drainage , you soil will soak and can cause root rot and drowning issues...
If was me , but i dont give a shit about the plant and will sometimes do reckless stuff , i might let it dry out a bit , get a bag of perlite , mix 50 /50 or more , then pull the plant out of the container and into a bigger one with more drainage - and maybe fresh
promix if you can get that...miix the perlite and promiix get a containter bigger so the plant can have a fresh area for its roots , like a third more space....
Risky but could work.,,
My idea is a little kamakazi... so maybe dont do my suggestion , you could end upwith a dead plant...
At this point might want to get a ppm meter and see whats running out the bottom when you plain water , and try to get the ppm down a bit by not feeding , maybe even taking some compost off the top,your medium might be really hot.....
Also move cautiously , dont add a high phospherous even though its recommended for flower , i think you have enough nutrients in there for a while , try to get stable , because yea that sativa leaning pheno has a month ? Left in her and will typically grow big and bigger bud by end of weeks.....
Which is still a possibility