I have a 75 gal. tank, as many of you might already know due to previous posts. My plants are starting to grow slightly better. It's been about 9 days since the tank was started, and this will be the fifth day of fertilization.

One thing I'm starting to notice is some of the plants are starting to grow more horizontally than vertically in the water. Plants like H. Micronthem. and Hygro. Polysperma are showing some serious horizontal growth. A few of the other plants are also showing some minor sideways growth like my Diandra. The B. Carolina, Swords, Lotus, L. Sessiliflora, Cabomba, and a few others are displaying "normal" growth.

I have 260 watts of PC lighting suspended above the tank in one fixture (two separate switches each control two sets of lights). The lights are currently 21" above the substrate and about 3-4" above the water line. If I removed the suspending device they would be at about 18" above the substrate and about 1/2" above the water line.

Do I generally have too much light? Could I do something where I have 130 watts on for 12 hours, and the other 130 watts on during the middle of the daily cycle for a shorter amount of time?

Thanks,

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Craig Brye
University of Phoenix Online