First time hydroponics. Poor baby :X

Hello guys I come here to this forum to ask for help as i struggle with my hydroponics. I'm using 600w LED for veg and flower. Cabinet temp is 22-24 C. Humidity is at 50%. I started off from seed in soil. Kept it in soil for maybe 3 weeks from seed until i got my hydroponic setup ready.

I washed off all the soil from the roots and placed it in my hydroponic system. Which is 13L bucket with 3L/M airpump supplying 2 airstones.

The problem began here. At the very beginning the moment I placed the plant in my hydro I prepared my solution at 130ppm NPK 14.5.6 using mineral free deionized water with 6ppm. I lowered the pH to 5.8 using white vinegar. That is what i used to maintain my pH for my soil and it worked great. My plant just started recovering after the transplant but right then i started having very bad pH issues and building up slime. The plant started looking ill again. I did quick research and understood it came from the vinegar. And the bacteria that it grows. I flushed the tank. Took out the plant washed the roots. I had slime all around my hyropon so I have replaced it with fresh one. I've placed it in plain water with 6.5 pH for 2 days trying to find sulfuric acid perhaps in my country this substance is restricted and it is not being sold in the stores. We do not have hydroponic stores. And I tried ordering nutrients and pH down from the internet unsuccessful twice due leak in the package. So currently i'm using fish pH down to maintain my pH low and it works but its day 2 and my baby still looks ill.

My roots doesn't look that bad but slightly yellowish i believe it is due the pH problems that I had.
Plant looks still strong and its growing fresh leaves.
Any suggestions?
I also found a submerged flower growing on the bottom of my tank right under my airstones and I removed it. >.<

I've currently lifted the nutrients to 300 ppm. Can anyone leave any feedback?

Yes. Raise the EC to 1.4, stop using vinegar for pH down, and tell us what you're using for food.

Make sure the food is suitable for hydroponics (N sourced from nitrate and not mostly urea) and that the hydroponic nutes contain calcium.

The nitrogen is urea and this one specific does not contain calcium. Should i look for different nutrient solution?
Why is nitrogen urea not good for hydroponics. Thanks for the information.

The main reason is that nitrate N will hold calcium in a solution, while ammonium N will antagonize it.

Most forms of calcium are insoluble in water, but nitric acid will dissolve it all, making the nitrates of calcium highly soluble in water.

I've red an article that says N urea becomes toxic. Shall I flush my tank and keep it with plain tap water at 250ppm until i get the correct nutrients for hydroponics. Will it harm my plant if i keep it in the solution I have atm?

Help please?

Hey guys. Currently i managed to get hold of sulfuric acid to manage my pH. I've also found fert that has NPK 8-5-7 with micro nutrients. The N is 3% Nitric 2.5% Ammoniacal and 2.5% urea. I also found Ca in the from of CaO+B. would that work for hydroponics?

bump

It might be able to hold you over, but you should really be looking to get any hydroponic line like GH flora 3 part if you want to use DWC.

This is exactly what I think causes most cases of root rot.

Hey i'm feeding it 550 ppm of the the nuts i mentioned i also gave it 2ml of CaO. It started growing roots and it seems its getting back to life slowly.Its seems i have 2.5 ammoniacal and 2.5 urea which leaves me with only 3% Nitrogen for my plant therefore the formula turns into 3-5-7 which is not suitable for veg at all. I'm thinking of finding nutes with low quantity on Nitrogen since i can not find nutes with only nitic and im gonna be looking separately for Nitric Nitrogen to mix my own nutes. I also noticed 2 very small burns on my premature leaves right at the tips. Should i be worried?

P.S. Id love to use hydro nutes but as i said they would not let them arrive as they gonna damage the bottles at the border and give feedback that the bottles have been damaged and thrown due leak.

You need a real verbal ass kicking to get your head straight about hydro. Your doing everything wrong pretty much and your plants are going to die, they will, im not lying to you. Im not going to verbaly lay the smack down because id rather not argue with you but im telling you that plants going to die.

Very negative comment. Instead of telling that my plants will die you can tell me reasons and how to bring them back to life.

I also checked the lables of flora grow micro + gro contains 3.7% nitric + 2.1% ammoniacal +1% urea which is quite close to what i have. The other research i did is i can use epsom salt to feed them Mg and I already found recipe for NO3-.