I don't know very much about plants but my sister says that Ludwigia grows faster so it's better because it will grow even if your fish eats it. Personally I like Anarchis better... Can some people give me some input?
If the tank conditions favor one more than the other, it will be the one to grow faster. In my tanks, it depends on which fish eat which plant faster as well as which grows faster. Knowing which will grow fast enough to offset the fish is a real guess. My fish love the tender leaves of anacharis and I wind up with sticks rather than plants so I plant those in pots and rotate them in and out as needed. Your fish will be different.
Personally, I find L. repens to be a hardier plant than Anarchis. Sure, Anarchis grows fast and all, but it has always melted for me over time or just simply been eaten up by my other fish. Although, I would love to try some again...
My ludwigia repens grows painfully slowly: it's very healthy and looks great with nice red highlights under the leaves, but puts out maybe 1.5 inches a month max - barely manages to outpace my crypt nurii.
Last edited by Jules; 08-17-2012 at 01:41 AM.