Overfeeding is the number-one cause of high nitrate levels in aquariums. Overfed fish produce much more waste than normal, and when more food is given than they can take in, the uneaten food rots and produces even more wastes. Keeping too many fish in a tank also leads to problems with accumulated wastes.
Symptoms Caused By Esophageal Ulcer. One classic symptom is a dull or burning pain. It is common with all forms of peptic ulcers. The affected person may feel the pain radiating within the areas starting from the navel up to the breastbone.
The most common stomach ulcer symptoms include abdominal pains and burning sensations; bleeding when vomiting or going to the bathroom; nausea and vomiting; darker stool; loss of appetite and changes in body weight; trouble sleeping due to pain; other digestive complaints like heartburn, acid reflux and feeling gassy; the risk for perforation of the organ lining; and dehydration, weakness and fatigue.