Hello, I've had a 55g setup for a while now and recently decided to try planted tanks. Upon research i found out adequate lighting is a major component to success so i went out and bought a 250 watt MH fixture. My problem is that when i bought 4 or so different plants i noticed they started to rot (leaves turning brownish). I looked into this and found out a planted tank with too much light needs co2. Ive heard of diy co2 but apparently 55g is too large for that. I just want my plants to grow and not die. How can i make it so my plants can grow? Did i go overboard with the lighting? Maybe its just my plants? If so what plants grow well in 4+ wpg? Any help is greatly appreciated. Thanks, jorge