What's wrong with my plant?

The leaves on my plant are turning yellow, curling down slightly and there are some red stems. This is the first time I've grown a plant and initially it was just an experiment with a seed I found, up until this point it was growing outside without any nutrients only water just fine. However since it started flowering I decided to purchase a tent and start using some nutrients and pH balancing the water etc and now I'm having these problems.

Check close for bugs. Post more info, nutrients, medium, ph, ec, lighting.

The light is a 150w niello UFO, I've been using pH balanced water , 1ltr with 2ml of bio bizz bio bloom and I've been feeding every time I water. Medium is just soil from garden center.

WeBiCan said:

The light is a 150w niello UFO, I've been using pH balanced water , 1ltr with 2ml of bio bizz bio bloom and I've been feeding every time I water. Medium is just soil from garden center.

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Like @J232 said look for bugs first. I see white spots on leaves. Also see foxtailing. Give the details J232 mentioned.

Looks like thrip damage..