the day before the first water change i had low nitrates 10 ppm, some nitrites .5 - 1 ppm, no chlorine, KH 80 ppm, PH 6.8, CO2 from what i can calculate is somewhere in between 21.5 ppm - 13.5 ppm. ? i dont think i have to much nutrients
ammonia was not high 3 days ago although i don't remember the reading.
in regards to ammonia, iv bin finding it very hard to clean the fish "POOP" off the sand substrate; the gravel vac sucks up the sand with the poo and, some of the smaller plants i have in the foreground
this is probably one of the things thats causing this disorder.