I've read as much as I could find on this forum, and outside, regarding the fatal disease, and am wondering if it can be attributed as a condition, as one poster put it.
fish:betta splendins, dark deep red, from brother's wedding and made a three hour trip in a car to our home from said wedding.
tank:10 gallon, laterite and gravel mixture topped with beige beach sand(store bought), powerhead filter, and live plants.
backstory:my second eldest brother took a liking to this betta from my oldest brother's wedding, so he took him home with us earlier this year April. I decided to give the betta a better home by eventually moving him to a 10 gallon planted tank from his inappropriate shiny 2 gallon vase, with no plants, and with the glass pebbles to boot, since fish absolutely LOVE that crap. Initially, the betta lived in said vase and did extremely well with distilled water changes treated for ph and the removal of chloramines and chlorine. The betta was finally moved to the planted 10 gallon tank in early August, and appeared to do well. Fish food provided was the same, betta tailored pellets, including overfeeding on my older brother's behalf which I could only verbally control, save a proper slap in the face, which never happened. Just yesterday, my brother tells me the fish doesn't appear to be well, and after isolating into a quarantine tank, finally dies from what appears to be dropsy. "How the hell can you kill a labyrinth fish known for being hardy" was my upset thought process.
conjecture:In the unplanted 2 gallon vase with just plain white gravel and with regular distilled water changes treated for ph and negative chemicals the betta was very healthy, and was so for four months. In the live planted 10 gallon tank with regular tap water changes treated for the same chemicals, the betta died. I'm wondering if overfeeding in an environment with an actual bacterial cycle could have contributed to this? Any thoughts?
ps. I built my brother this tank so that he could have a source of relaxation other than tv; he only fed the fish.