First Grow - Day 9 Seedlings, Looking for Feedback and Advice 🌱

Hi everyone,

This is my first grow and I’d appreciate some feedback on my seedlings.

Grow setup:

* 100x100x200 cm tent

* Mars Hydro TS3000

* Light distance: 40 cm (16 inches)

* Dimmer: 35-40%

* Temperature: around 28°C (82°F)

* Humidity: usually 70-80%

* Growing in soil

Root booster schedule:

* Day 4: 1 ml

* Day 6: 2 ml

* Day 8: 2.5 ml

Plant #1 – Day 9 from sprout

https://preview.redd.it/kckjce9jav4h1.jpg?width=1200&format=pjpg&auto=webp&s=8a3e932e51d677a2f51292eea426a74458bcedaa

Plant #2 – Day 9 from sprout

https://preview.redd.it/ny3rlo7lav4h1.jpg?width=1200&format=pjpg&auto=webp&s=6ec4e014a7f952ddbd0f4896411ae831292965a3

Plant #3 (Mutant) – Day 9 from sprout

This seedling emerged with only one cotyledon and appears to be a mutant, but it continues to grow.

https://preview.redd.it/pcdjf43oav4h1.jpg?width=1200&format=pjpg&auto=webp&s=e0a17e0637b4f0d13ea4fdec2cdfae3726596565

Do they look healthy for Day 9? Any concerns, suggestions, or things I should improve?

Thanks in advance! 🌱

I recently increased the light intensity slightly because the seedlings were stretching a bit.