Hey Guys needs Help !

Hey guys my plant is potted in canna coco and over the past few days ive seen some colour change in the leaves im vegging under a T5 light my last feed i gave a 3/4 strength canna A + B im useing RO water this is my first grow so any help would be much apprenticed

In my opionion it looks like a ph issue (granted I dont grow I coco so take this with a.grain of salt), when imy plants in yheir peat mix get the ph all messed up on em they start to curl and twist like that.

That first pic kinda looked like some mite damage maybe? Couldve just been sessile trichs tho.

And what are the conditions of your grow? (Temp, ph, light, venting, nutes etc.)

Im feeding 3/4 strength Canna A + B with RO water my temps are about 23c im only running a intake fan right now and im useing T5 grow light humidity is about 50% what could cause Mites ?

Does the canna ab have micros in it? Ive never used it but I would assume it does. To my knowledge ro takes everything out and you neednto add everythong back in. In a lotnof threads where ppl are using ro water they are short on cal or mag. (Ppl with deficiencies in ro anyway)

If I were you id go with only exhaust and use passive intake. And mites live outisde but theyre pretty good atngetting inside as they cling to ppl/animals and they can float on air currents.
*sorry for typos. On phone and in a rush