Hello, Thanks in advance to any who can read through this LOOOOOONG post New member, but I've been reading the forums for a few months. I started a planted jar which has been going well for a couple months (minus my mini pelia that I just removed), but in the past week the plants seem to be looking sad. A quick description of my setup: cycled 1 gallon jar, USB LED light, no filter/pump, substrate is Black Diamond Blasting Sand with root tabs, and a few plants. Fauna consist of a nerite snail and a few shrimp - rili and Amano. 1) In the back, the crinum calamistratum was initally perky, but now it's weepy - a new addition about 2-3 weeks ago in the jar. 2) I had a lot of red root floaters (RRF) that were doing well also placed in the jar at the same time. Again, they have been doing well, turning color and creating flowers and new leaves, doubling in size over 2 weeks, but now they also seem to be turning dark and look like they are slowly being eaten or something. They now occupy less than half the initial surface area. The shrimp are now constantly eating around the roots. 3) Ranunculus Inundatus. This plant was also added 2 weeks ago and came from what I believe was a CO2 infused aquarium. There are some runners, but the older leaves seem to be turning yellow and brown, and some of the stems are also turning yellow. The mini dwarf hair grass seems to be doing ok so far, still sending out runners. I have been daily dosing Excel, Iron, and Flourish Advance as marked on the bottles. I was doing Flourish every 3 days, but just changed it to one drop a day to hopefully add more nutrients to the water regularly and maybe reduce chance of algae. The USB Light is on for 12 hours/day for the last 2 months - no major problems with algae besides normal on glass and some brown algae down below. Also, the USB light is actually bright and the DHG has spread a bit and gets weekly trims now, but I am making a new light with a timer. I did a 30% PWC two days ago, but my nitrates seem really low in the tank compared to my tap water (well water, no chlorine). I was debating getting some Spectracide Stump Remove to up the nitrogen level, but am not sure if this will fix my issue. It looks like there may be some pinholes in some of the RRF, but hard to tell since it's mostly the leave slowly disappearing from the edge to the center, unless they turn dark gray and fall off. The Ranunculus Inundatus (RI) old leaves are turning yellow which could be low Nitrogen or maybe Potassium or Phosphate looking at the nutrient deficiences chart. The new growth on the RI is tall and small, but I think that's consistent with it being a change from high CO2 to dosing Excel. Also to note, the shrimp really like hanging on the RRF now although when I removed RRF temporarily they were happy to scavenge elsewhere. Maybe something's special about them unless it's just their decaying roots now... Anything else I forgot to mention? Anyway, thanks again if you made it this far and I appreciate any and all comments/help you can provide. I am trying to find a DIY method for fertilizers, but can order other stuff instead online, too - no preference, just trying to improve the plant health. Offline now to catch some sleep. Thanks!