You will have to flush with correct ph and tap water or RO water. Once runoff is coming out and ph is stable then give it another 1/4 or 1/2 gallon, this time make sure it had nutes and correct ph.
I would let the plant dry back half way before doing this to prevent drowning it. If it's SUPER out-of wack then your going to have to, you will do more harm then good waiting.
Then leave it be. Let tent get a little warmer so it pulls more air, make sure fans are pointed on the soil to dry it out.
Of you correctly added perlite or vermiculite then you shouldn't drown the plant.
Goodluck and please consider selecting me as the answer so I can be entered for a chance to win grower of the month contest I would really appreciate your support growmie 😃 🙏