bubblegum autoflowers, guessing some deficiencies, could use some confirmation

[galgomar]

- First time grower here,
- Bubblegum autos, nearly week 7 since sprout
- plagron lightmix soil in approx 8 liter pots + 30% perlite
- 2x4 tent, 100w spider farmer lights
- RH is around 60-70% (a bit too high I guess)
- 18/6 light schedule
- carefully fed them from week 2-3 with plagron grow nutrients, rising the amount from 8% to 20%, since they started to flower, switched to bloom nutes, gradually decreasing veg nutes
- signs of deficiencies showed up like a week ago, speaking of the first picture (not sure tho if the second pic of 2nd plant has deficiencies)
- yesterday fed the first plant with 0,5ml of magnesium fertilizer (NKP of 6-0-0 + 10% MG) diluted in a litre of water, no signs of healing yet
- trying to keep the water+nutes PH around 6-6.5
- watering only when the pots feel lighter

Im worried since no experience, could use some help

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[Creeperpark]

Your plants are suffering from a low or incorrect EC. When you added 30% perlite to the already light mix you weakened the manufacturer's product. The manufacturers are usually professional horticulturists that know a lot. When you add something to the mix you lose their professional qualities.

It's best to keep a consistent EC without fluctuations. The way I do that is to keep a steady feed going from beginning to end. Instead of feeding heavy and then light I keep it the same low feed so the plants can take what they want without a lot of excess chemical exposure.

These plants were given a constant low ppm feed (300ppm) with every watering. Never just plain water. It takes the whole growing season for the plant to get what they need.