Why does all my Ludwigia hate both me and probably you?
I have three varieties of ludwigia in my tank. The Ludwigia ovalis grew beautifully and so much that I recently had to trim it down.
The super red and the Ludwigia peruensis (also called Ludwigia glandulosa) however are showing lots of new growth but the leaves are much more narrow than the originals. Photos of the plants online show this isn't just a change from emersed growth. It's hard to search for what they could be defficient in because googling "ludwigia with narrow leaves" is just going to return hundreds of pages about the narrow leaf variety of Ludwigia.
Does anyone have any idea what could be causing this odd growth? Everything else (including the ovalis) seems to be growing great. The light was lower for a while to combat some algae, but has been turned back up for a few weeks now. The returning redness of the super red would lead me to believe they are getting enough light. No CO2. The temperature is cooler than some tanks on here at around 72 F. Ammonia and nitrites at 0, nitrates at about 10 ppm. KH 4. GH 8
In the pictures you can see a few of the older much broader leaves which don't appear to be melting. All of the new growth however are these much skinnier leaves.