Parameters are fine, I did several water changes a month ago to get rid of to much salt that i put in. Is it too warm roughly 27 degrees Celsius? Is it the plant nutrients i put in? I clean the tank every week with a toothbrush to get rid of algae, then i do a 25 percent water change and rinse the filter in the tank water. I use de-chlorinate.
Its about 2 months old and I have 8 neon tetras, 14 gallon.
There is a shrimp in there to, saw it a week ago.