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Well I have some java ferns for like 6 months and tht haver done much, just shot some roots and a brown leaf is dying but I think I'll keep it bc maybe néw one will form on it. Also hornwort worked. Anacharis didn't work, it just got eaten by fish
Hornwort would probably be about the only option. Even java ferns won't do much under only 30W of light in a 55. You could probably keep java moss and anubias alive, but it won't grow much.
Yea my java is growing very slowly. Is is shooting roots and small tiny leaves coming from the base of the roots. I think that's a good sign right? Also my hornwort is growing again. It's like on/off cycles. So what is goin on with my fern?
Sounds like the fern is reproducing. Those small plantlets will eventually separate and grow new plants. You can pluck them off and replant them when they mature a bit.
Let them develop leaves and then you can pluck them off.
I wouldn't worry much about fert supplementation or co2 injection with that lighting. Down the road a good trace mix might be beneficial but that would be about it.