Agree with every word Gregg just said, emphasis on the cleaning and pruning part.
I wasnt sure if you were actually trying to fix things, or just running an ammonium experiment for the heck of it. But to get things right you need to do a BIG clean and pruning. Remove some biomass, all that old growth thats in bad shape.
This general tank husbandry which is basically grunt work and so often overlooked will solve a multitude of problems
Then make sure CO2 is good and lard on the macros, especially KNO3. Keep dosing the .15 micro blend 4-5 times a week, daily or whatever.
There's no mysterious boogeyman to kill and no magical fix to solve everything. The same things will help these plants that help everybody elses - good husbandry, good co2, and plenty of ferts.
Personally I agree with Burr above. Pogo K. looks stunted.
IMO forget the Ammonium Sulfate for awhile.
Get CO2, lighting, and regular old macros right first (more).
And get back to basics. I'd do a large trim/pruning, get rid of algae infected parts, lower the mass, get some space between those species, and get things uber clean (vacuum, clean filters, extra water change).
See how things respond, then mess with things like Ammonium.
Appreciate the input, I largely attribute some of the issues yall are seeing to my 11 hour photoperiod, but I could be wrong.
However its something I am OKAY with to be able to view my tank for more hours of the day, 11am to 10-pm I have light on my tank.
Not sure I want to reduce plant mass, I think its my favorite thing about the tank, but if the plant mass is causing a deficiency that is noticeable I will increase to compensate.
AR Mini and mystery ludwigia, Dwarf Hairgrass, are my only plants that get algae on them, everything else is fierce and aggressive... and I have the BUM parvula hairgrass which wont even go over 1.4 inches tall if I try.
how sensitive is Kimberley for lighting?
I got 3" tall stems, and they are close to 27 inches from the light...
I almost didn't order them when I found out how short they would be because I knew they would be starved starved starved for par.
My lighting is not as good as Burr's but my Ludwigia Rubin has gotten much denser, tighter nodes, fatter leaves, since I recieved it..
The pigmentation has dropped off but that seems strictly lighting related if you ask me..
The other characteristics though are better.
That could simply mean that my lower light allows the plant to provide its tissues with nutrients at a better rate- too much light will make some nutrients limiting and so the plant could look less vital.
I mean... the new growth smashes the growth that was on it when I recieved it..
Clino internodes at 12 inch above substrate with no ammonium..
Clino at 4 inch above substrate with ammonium
Scale might be hard to determine.. but it is much denser.
I don't have the intensity of light to produce the reds.
And It is not height related, higher up in the tank the nodes were longer.
I trimmed the plants to remove this variable, put the plants low in the tank, the nodes are smaller by a good 50%
1/3 inch vs 5/8 inch atleast.
And its not just the new growth, new growth before was still long and stretched.
And if you are thinking its color spectrum, i'm running the kessil on full warm just incase that is a factor.
Thats still only 5k, but i shouldn't be causing compact growth with 5k.
... L. Rubin has internodes in the 1/8th of an inch now vs 1/2 when I got it.
Surely one kessil isn't brighter than multiple t5ho and cant induce that.
Unless its a response to my 11 hour photo period, summer vs fall stuff, idk.
I could reduce photo period to 8 hours and prob stop all the algae yall mention, but thats not anything I'm trying to prove, thats not part of my experiment.
If the algae is ugly, yes it is, I do apologize.
But that doesn't derail my experiments, nor can the algae induce stunting in kimberley afaik
What are your weekly PPM's in NPK?
If I am far off I would love to add more, nothing makes me happier than dosing lol!
Including Nh4 and kno3 My N is probably 50-75 percent more than most, my K is dramatically higher as well.
I dose 12ppm a week of Po4 to prevent GSA.
New tank water is introduced at 21ppm CA per week.
What exactly do you mean by getting my macros right?
What exactly is RIGHT?
Do you just mean lean my plant mass out until what "most" dose is the same as what I dose?