Flushing out living soil after over fert

I have 4 girls in 56l pots of living soil, they’re at 3 weeks old today, they had been in 2l pots of light mix and I was just feeding them kelp and ewc tea, when I transplanted on Friday I gave them the same kelp and ewc tea, woke up yesterday to burns ‍‍‍‍. This ain’t my first merry go round so I feel so bloody stupid right now. But it’s my first soil grow ever after only using rockwool before. I hear I’m not supposed to water to run off as it washes t he goodness out of the soil, so how do I flush out this mistake? Any help is greatly appreciated

It’s also worth noting that my smart humidifier ran out of water during the night sending the vpd up to 1.9 for about 3 hours

You don't. Just let them ride and adjust to their new home. Trying to flush organic soil is just going to compound things. Post a picture or two.

Any pics? "Burns" could be caused by any number of issues from intense lighting to nutrient lockout.