Over the last week or so, I've lost 6 fish, one every couple of days.
Tank is fresh water with splashes of aquarium salt; running for 8 months.
PH 7.0
Amm 0.
Nitrate 0.
Nitrite 5.
Temp 26C // 78F
Tank is 170L == 45Gal
2 weeks ago I had 4 male Balloon Mollys, and 6 females, as well as 3...