Hi there, I was hoping someone can give me some help.
I've had 4 betta fish over the past year or so. All of them were healthy and very interactive. However, each time I performed a full water change on my 2.5gallon tank, my fish would die within a week.
I made sure to gradually acclimate them into the new tank and added chlorine water treater, etc.
For my last fish, I was afraid to perform the 100% water change for this reason. I had him for 4 months and was performing maybe 1/5th water changes every few days. However last week the water was pretty dirty so I felt i had to do a 100% water change. Just found my fish dead this morning.
I am not sure what I am doing wrong and could use some help. Thanks.