Originally Posted by sixnickel
so would having just one live plant in my tank help keep the water quality better
what sort of light requirements do they have
Good morning six...
Tall, fast growing, stem plants work well to filter the water. Research Water wisteria, Rotala, Ludwigia and a floating plant called Water Sprite. If you had these in your tank, it would help cycle the water and make it safe for your fish.
As for lighting, you'll likely need 1 to 2 watts of light for every gallon of tank size. So, a 20 G tank will need close to 40 watts of light. If this is confusing, just let me know and I can explain further.