Originally = 10 neons and 4 male guppies
Tank setup = 6 months
Testing (today) ammonia 0.25 ppm
, nitrite 0 ppm
, nitrate 5.0ppm
Problem = one guppie and one neon died within a month for no reason that I know, totally fine and feeding the same day.
The guppy died first I found him dead in the filter the next morning and he was totally fine at lights out the night before!
Neon terra= died yesterday, when I got him out, I did a 50% water change. I tested the water the next day(today) and the results are above ^. The neon was totally fine on the morning, it ate and was schooling with the rest, found it dead on the afternoon with no marks, bloating or signs of why it died.
Can anyone help?