Thanks! Looks like I was overreacting regarding any diseases :rolleyes:. I took samples of the water from before the complete water reset and it turns out the nitrate levels were really high (I think I hadn't been cycling the water enough :( ) and that was likely what was causing the problems...
Hi everyone!
TLDR at the bottom;
I've come here looking for help working out what's going on with my fish - over the course of the last day I've had multiple tetra's die and I'm worried about my Betta now :(. I've owned a tank of fish for around a year now with a Betta and 10 tetras without...