ludwigia peruensis question - The Planted Tank Forum
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post #1 of 4 (permalink) Old 07-17-2004, 04:21 AM Thread Starter
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ludwigia peruensis question

I've set up a 75 gallon with 4 2x32w ODNO lighting, DiY CO2, flourite gravel. Been running for 3 weeks, 2-3x weekly dosing NO3 and PO4 to keep levels 10 and 1. Heavily planted, with everything in it growing well except the ludwigia peruensis. The top leaves are nice and red, but the lower leaves are either falling off or are dark green. The main concern is that half of the stems are rotting mid-way, even though the tops of the stems seem to be doing well (healthing looking red leaves).

Is this a lighting issue, or is there anything else I can try to salvage these plants?
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post #2 of 4 (permalink) Old 07-17-2004, 06:45 AM
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It may be light intensity? I don't know for sure, but mine are doing fine with 4wpg of PC lighting. I figure your lighting should be fine with 3.5+. Mine are red to about 3/4 to the bottom, then I have the same rotting leaves that fall off and get stuck in my surface extractor or filter intake. You might not have them spaced out enough so lower leaves can't get enough light. I have mine about 6 inches apart...seems like a large distance, but the leaves get so plants are all at least 8-10 inches in diameter if you look down on them. (take a look at my 46g in the photo album). Since I only have eco-complete/gravel I put some fluorish root tabs underneath and they've been fine.

As far as some literature, I've read it's actually a woody species that grows both emersed and submersed. My stems are about 1/4 inch in diameter and so they look like trees in my tank.

If that's bothering you, I would definitely space them out more, then plant something you can keep trimmed to hide the lower half of them. (I have that huge driftwood tunnel that is covered with moss in front of mine.) Hope this helps some...

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post #3 of 4 (permalink) Old 07-18-2004, 09:28 AM
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lower stems rotting is usually a sign of insufficient light, or the plants are to close together. You should have 2 to 4 watts of light per gallon of water. I grow this plant in a 55 with four 65 watt power compacts and C02. It will still loose the lower leaves if the plants are too close together

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post #4 of 4 (permalink) Old 08-16-2004, 03:50 PM
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can someone show pics of this plant? I think I have it too. But I like that look of roots roots roots. Love the java ferns for that reason. I think it gives the tank a true natural look( like the bottom of a pond) as opposed to that snip snip snip look.
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