LD, "fraught with perils" is an understatement. I go through the threads online about plant diagnosis and it just makes my head spin.
One thing keeps going through my head when I look at my plants and try to see what is wrong with them. That is the statement you once made of people always trying to find something to fix rather than seeing if we overdid something to begin with - or something like that. I hope I didn't butcher your good advice.
Actually your idea of giving them the Neptune's Harvest Fish Hydrolysate and the Kelp Extract I have sounds like a good idea. I had been a bit worried about giving them any right now since both those were in an ACT I gave them about 5 days ago.
Anyway, when you say tea, you mean diluting in a gallon of water and feeding them? Or, actually brewing up an ACT? Just so I am clear.
I will give things a few days and hit 'em with your recommendation. One plant seems to be recovering, but the other runt is too far gone I believe. Seriously, it is 4 weeks old and about 4" tall with about 8 sets of leaves. Never seen anything like it.
I love diagnosing plants, i can see what's lacking no problem, but helping people fix it isn't easy becasue they are all using bottle of stuff to fix the problem and i don't know what bottle they used that caused the problem but it's usually a new bottle they bought last to fix the last problem from 2 weeks ago...at least with soil it's more straight forward, your soil is lacking something you need to put in it.
Remember my K problem, all the seeds and nuts and stuff i used? it's worked btw. You can add stuff to the soil mid grow and not kill off the plant, i gently poke verticle holes with a pencil and added coloums of 'stuff high in K' to the soil, you could probably do the same, or top dress if you think your root zone would get injured too bad by poke holes. I'd try this for shits and giggles, guano(high P guano) and steamed bone meal tea with hydrolyze fish in it and a handful of EWC or compost to start the breakdown in a bubble bucket and run for 15 hours to optimize the fungus content.
you can make a lactobacillus bucket with cantaloupe rinds(high P), cucumber skins, and potatoe skins and when it's slimey you add phosphoric acid until the ph is ok and use some in water to give your plant some P. Take a while longer than the bone-batpoop tea. Are you showing signs of K def too, i noticed that they come together for me in my plants, i know not why, maybe plants needing the missing P need extra K to facilitate the movement somehow??? Post a pic.