Golden nesaea - stunting
I've had some golden nesaea in my tank for probably a year. For most of that time, it has languished with withered leaves, not really dying but not really living either. By giving it some more light and staying on top of fertilizing/maintenance, I've gotten it to grow at a decent pace. However, its leaves are still terribly stunted. The new growth is twisted but at least has a nice color, while old leaves quickly waste away. I added a DIY Osmocote root tab about a week ago, but it hasn't been long enough to see if that helped.
Ludwigia sp. - stunting
I've also got some Ludwigia (repens red maybe?) that's been in the tank for several months doing even worse. I'm not sure it's growing at all, it refuses to root, and almost all leaves are dying and covered in algae.
Ammania gracilis - stunting
Lastly, I added some Ammania gracilis a few weeks ago. Its new growth is twisted and curvy (almost looks shriveled).
Limnophila sp. - stunting
At the same time, I added some... Limnophila indica? Can't recall exactly, but something with delicate green leaves like that. Anyway, it quickly started growing all twisty, and it's quickly turning brown and/or getting covered in algae. It's also not really rooting.
Incidentally, all of these plants are in the same area of the tank. However, I think that was just be subconsciously putting all the ugly stuff together when I rescaped the tank a week or two ago.
Plants that are doing well
At the same time as those previous two plants I added another Ludwigia (can't recall the species; really need to start paying attention to my impulse buys at the LFS) and some AR variegated. This Ludwigia is doing great
, with rich, deep red leaves. While it's getting some algae, the AR's new growth looks decent and at least not stunted.
Everything else in the tank is also doing great:
- Anubias barteri (seriously, this thing is gigantic... not really sure what to do with it)
- Anubias afzelii (also enormous)
- Anubias frazer I think?
- Anubias petite
- Dwarf chain sword
- Dwarf hairgrass
- Giant baby tears
- Hygro pinnatifida
- Hygro araguaia
- Hygro kompakt
- Java fern
- Limno hippuridoides (this one has been looking a little yellow/grey lately)
- Riccia (I'd categorize this one as doing "okay", but it's constantly being broken into a million pieces)
- Tiger lotus
- Val vesuvius
- Marsilea (also doing just "okay")
- Various crypts
It's a 64 gallon (48x18x18) with a Fluval 3.0 that's on 12hrs a day but only peaks at max brightness (i.e. 6hrs of ramp up, 6hrs of ramp down). Good amount of water flow with a Fluval FX4. I just redid the tank with Kwikrete PFS; prior to that it had BDBS.
CO2 injection comes on a few hours before the lights, and by midday the drop checker is yellow-green with fish hanging out toward the surface but not gasping. I dose EI with 1/2tsp* KNO3 and 1/8tsp KH2PO4 on M/W/F, 1/8tsp CSM+B and 1/32tsp DTPA 11% iron on T/R/Sat, and a 50% WC on Sunday. After the water change, I add 1tsp GH booster. I was recently dosing 5mL Excel daily to combat some BBA, and that did not seem to make a difference for stunted plants.
*This past week I've cut back to 1/4tsp KNO3 after noticing nitrate levels around 40ppm. Fish don't seem to mind 40ppm, but the LFS guarantee requires 30ppm or less.
Off-gassed pH is 7ish, KH is 2-3°, and GH was 3-4° back when I was testing it a year or so ago. Water temp is 78°F.
While I'd be fine throwing the Ludwigia and Limnophila in the trash, I'd like to hang onto the gracilis and I really want to make the golden nesaea work. Any suggestions?