New Year Grow - Moby Dick XXL

High Y'all,

This my first indoor grow but I've grown outdoors for a few years. This is my set up.

Lighting: Mars Hydro TS1000 (150W Full Spectrum) + 2 Additional 30 W Clip on LED lighting from Amazon will be added when flowering starts. So in total 210W in total.

Ventilation: -AC Infinity 4" Inline Duct Fan with temperature and humidity control.
-20 W Monkey Fan by Secret Jardin

Structure: 2.7ft x 2.7 ft x 6 ft Secret Jardin HS80

Medium/Nutes: - Canna Coco Coir mixed with Gaia Green All Purpose 4-4-4 and Gaia Green Power Bloom 2-8-4 + 10% Perlite
(4 tbsp of Gaia Green Nutes per gallon of Canna Coco, 75% 4-4-4 & 25% 2-8-4)

Temp/humidity: The temperature consistently stays around 72-77°F and the humidity stays steady at 35%

pH: when germinating I kept the pH at around 6.0 but now I water with a pH of 6.5

I've planted 4 seeds and 2 of them look great but 1 of them stretched and went limp so I replanted it, still germinating. The last one has yellow tips, why is this happening and how can I fix it?

Anyways, I'll be posting updates weekly.