Well that's the thing, in my old tank I had a regular T8 bulb, the tank is 15'' high and none of the previously mentioned plants like swords, anacharis, hornwort worked for me. They would all brown up and die. The new tank doesn't get any sunlight, unlike the old one that was getting few good hours of direct sunlight cuz it's next to a window. Could it be that the old tank was getting too much light? I'm also planning on putting individual switches for the bulbs so I will be able to work only one or two bulbs and reduce the lights if it starts growing algae.