Help with plants in tank

[Shalom9]

I am a beginner. I planted plants in my tank but they begin to die. I added fertilizer and co2. Is co2 dangerous for fish?

[wongce]

Hi, shalom,selamat datang... Maybe you should introduce yourself first...

Secondly, do you have sufficient lights, whats the setup details e.g tank size, substrate,plants, full tank picture...for seniors around the forum to help/advise you..

Thirdly,co2 is good for plants in a certain level,its about balance. For your information,all gases are poisonous in large quantity...

[Shalom9]

I am just new to fish keeping. Maybe you can advice me on fish keeping and how to start a planted tank. I have mollies, guppies tetras swordtails. Can please advicer. TQ