My betta just died and now my pleco is sick.

Jan 6, 2018
2 weeks ago i added 3 female bettas into my 50 gallon tank along with my pleco, crayfish, and other female betta. everything was fine for the first week and then in the middle of the second week the 3 new ones died. i took a look at my original female betta and She had cloudy protruding eyes and scales and she was covered in gunk, same with the pleco. I thought i could have been dropsy but she wasn't bloated and neither was the pleco. i took my water to my local pet store to get it tested and they said everything was good except my ammonia was a little high. i told them about my fish and they said it was probably fungal so i treated the water but nothing worked. now today, my betta passed and my pleco is still sick so i did a full water change and cleaned everything. i thought it was just high ammonia so i put my cray fish and pleco back into the clean 50 gallon tank, but after a couple hours the water is foggy. there is a scratch looking thing behind his right eye like he scraped himself and holes in his fins and he has red streaks and spots. ive been doing everything and looking up stuff but nothing is working. i just want to save him but idk if its too late and hes just suffering. i have a filter and heater and everthing you need to balance your water.

Last edited:


Superstar Fish
Jan 11, 2013
East Aurora, NY
What was your water change schedule and amount changed up to the point of the deaths/problems?

You probably know this if you've been doing some reading, but aquariums require regular (usually weekly) water changes to keep nitrates in check. You should have a liquid test kit on hand like the API master test kit to measure in PPM for ammonia, nitrite and nitrate. The test kit lasts for years.