Weird twisty growth tip

The top growth is twisting but starts to fill out as they grow. I had 4 other plants growing and none of them showed this. Just recently killed them because they were males.

Ph 5.5 - 6
ppm 800-900
Temp is around 20C

This plant is a huge Potassium whore so I'm feeding it about 8ml per of a 10-16-17 in veg with a little bit of micro. Also added .075 ml per gallon of floralicious plus. All plants before this one were healthy minus one mutant that started showing sex at 10 days.

I've never seen this one before in any of the sick plant guides. Help plz?

Looks like you jumped the gun on potassium ... They look like they are barely sexing out .
You should still be on veg nutes ... Even up to week 1 of flower.

The twisting is a result of your feeding and it is trying to figure itself out of it.
It looks like you are in a perlite hempy medium which can be a little sensitive to what you throw at it .... I would run ph balanced water ( 6.0 ) to purge the excess. If you are in a container that is a drain to waste style container ..... After a few days ... Start a 1/2 strength VEG feed to allow plant to correct itself.

I use 20-20-20 for veg nutes. adding an additional 2.5ml of 0-12-12 bloom booster to fix a K def i was having.

So the question is, will i be alright sticking to the 20-20-20 or do i have to fork out more money for a veg fertalizer? I'm really broke because I just got some new gear and it'll be a while before I get more income.