[scottysgirl]

OK, here is the mystery.
I tried to grow hornwort once in my big tank (2.5 watts per gallon, 78 degrees, adequate filtration). It was semi-floating, but immediately started to turn brown and died. I transfered the one living piece of it into my bettas aquarium (5 gallons, unfiltered, 80 degrees, no light except indirect from window). It grew large and turned a deep green. Nitrates 10ppm in betta tank, 25 ppm in big tank, no nitrites. I fertilize the big tank once a week. Why did the hornwort grow in the betta tank and not the big tank?
Thank you

 

[scottysgirl]

It is a flourescent light, a 'grow' light from the hardware store, and then another flourescent light that came with the hood. The big tank also gets indirect sunlight

 

[scottysgirl]

I also have two crypts in the big tank (one huge one), three corkscrew vals, two taller vals, 1 lilly, 1 crinium bulb, 1 anubias, and one other unknown plant. I fertilize the tank once a week with a liquid fertilizer. I have thought about using fertilizer tabs, as I have had trouble growing plants in the past.