badly curling down leaves

since they came out of the soil they looked like this and im not sure whats causing it. ive had this problem with other grows started before. i use those fish water ph testing strips and it read 7.2. i know their not that accurate but it still seems to high. ive tried using less water and ive tried using more and neither has changed it any. my soil is not a good soil but its what i found. lowes sta-green .05-.04-.03 mixed with some perlite.

well ure first mistake was planting those all in the same medium.,.,seperation for ro0t domination is the key.,.,seperate in2 there own pots and then ull have sum healthy plants or sum dead ones.,.,the one at the far bottom is lo0king nice and strong as if telling the others to kick rocks.,.,lol

its a 5 gal bucket. i was gonna leave them in there for a few wks then move them into seperate pots. u think with how young they are in a 5 gal bucket that space is still an issue for a few wks?

im just gonna seperate them in a few hrs. is there sumthin else that could be doing this though?