That tank is turning out really nice. Do you have mesh over your light to reduce the intensity for your low-light plants? It's looking good, especially that A. barteri var. nana "petite". I like that plant, I once skipped the chance to buy some and have always regretted it. I do have some A. "nana" that I've had for about 7 years, it started with a 2 inch rhizome and is now around 24 inches. It is indeed a slow, but steady grower. Once established, hopefully you plants will send up flowers, they are really attractive, though it may take some time. Be sure to let us know if they do flower, it would be interesting to see what it looks like in the petite form.
Yup, the mesh is to reduce the light, otherwise it's more of a medium light, based on what others have said here. I'm not interested in being an algae farmer right now.
Are petites rare where you are? They seem common here which is how I got several pieces. I'm very impressed by a 24" long nana and I would love to see that. I'm considering a small emersed setup just to grow anubias petite to a much larger size faster, probably not to 24", then resubmerge it back into my tank. My reading is that anubias are triggered to flower by a several weeks of elevated phosphate, but I'm not going to try that until they're bigger.
Also, how are you enjoying your C. habrosus? I tried keeping them a little while back, but I couldn't keep them alive, not sure why. They were eating a couple different foods, but slowly withered away one by one. Some Endler's in the tank were fine, but maybe the ph was too high for the little cats. What are your readings and/or any secrets to success with them?
I'm very much enjoying the C. habrosus and their bottom-feeding behaviors, which is a minor miracle because I'm not a fish person at all; I very much prefer invertebrates and I gave away a fish a few years ago when I kept a reef. I wouldn't call it a success yet since the corys have been in their new home for only a few days. I'm feeding them New Life Spectrum Water Stable Wafers (same food as when they were at the LFS), but I'm looking into other options, including cultivating my own worms. As for my parameters (API test kit) as of two days ago:
Ammonium/Ammonia: 0 ppm
Nitrite: 0 ppm
Nitrate: 5 ppm
pH: 6.4 (daytime)
GH: 5 degrees
Temperature: 75.4-75.9 degrees F
My understanding is that they come from slightly acidic waters, but they're generally adaptable. I'm not aware of a specific sensitivity. What was your pH? Were they eating regularly? Mine have been voracious eaters.