If a glass of water clears from the top down it means the sediment is settling out and if it clears from the bottom up it means that the disolved gasses are dissipating.
Chlorine reacts with water to form hypochlorus acid (HCl) so the reaction of Sodium thiosulphate (the active ingrediant in most dechlorinators) with chlorine gives:
Na2S2O3 + 2HCl = 2NaCl + S + SO2 + H2O so where does the nitrogen come from to form ammonia?
I think that is what it is ( it used to be called peruensis I think). I haven't grown it submersed as my lights are not strong enough but I have had two forms of it. One is a darker red (almost purple) and the other more red. I think yours is the latter. One branches more and throws more arial roots and one will grow under less intense light but I can't remember which one.
I knew everything when I was young but have been learning every day since and have just turned 65. Perhaps I didn't then. I consider myself lucky to have not killed myself or someone else while driving and to still have all my extremities after making a lot of things that went bang.
Chytrid can be cured with chloromycetin (cloramphenacol) but I am not sure how or at what rate it is used. It is also a difficult antibiotic to get hold of because it is the antibiotic of choice in the treatment of cholera so is restricted in use to avoid resistence.
There are a number of things that do that. Oak leaves that have fallen from the tree, oak bark, peat, cones from the alder tree and teabags to name a few. I have used them all without problems.