Help with my coco a b schedule. Thanks

I have a 4 seedlings all 3 1/2 weeks old and all looking healthy and I fed them their first nutrients Sunday. Coco a b and I made it low ppm 350. Even tho the chart said to double the amount but it was 700 ppm if I went by the feeding chart from Canna for the. Coco a &b .

Is that gonna burn my plants in soil? 700 ppm they are only 3 1/2 weeks old
I’m growing in a tent with. 2 , giixer 1000w led manual veg button. Plants are 32” from lights
Do I need to turn on the ventilation system. ?

Is my set up ok?

My plants are in 1 gallon pots with soil and still damp from last Sunday’s feeding 4 days ago . Not dried out yet but not soaking or that wet just damp in the soil . . Do I wait till dried out more to give water ? Can I just feed coco a&b every feeding or have to alternate water then feed water then feed?

Mahalo for any help or advice :call_me_hand:t4: