Beginner zkittlz bag seed

Hi so i ballsed up and think i gave them the wrong strength nuits....i think anyway luckily they survived and made a lot of progress (i think so lol) i flushed them with plain water and have kinda left them alone since so not much to report, i crapped my self thinking it was root rot but i had a wee look and everthing under the medium is white and healthy so phew. i did add a exhale co2 bag and a humidifier to the room so i think thats helped them recover from my mistake a bit faster ( i am a noob ) but hopefully next week will go on without issue. thanks for reading