Pineapple Express and Green Crack

I had 4 plants but one of the Pineapple Express plants died. I think it's because I tried to make CO2 with vinegar and baking soda. It spilled over onto the floor of the tent and one of the Pineapple Express plants absorbed it from the floor. I felt so badly. The tent was really crowded anyways and it's better with 3 plants. I'm amazed at how fast the buds are growing now. Because my tent is so crowded, I have been removing the leaves that seem to block light from the buds. I hope that's ok.