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.
In addition to peptic ulcers, a number of conditions, notably gastroesophageal reflux disease (GERD) and irritable bowel syndrome, cause dyspepsia. Often, however, no cause can be determined. In such cases, the symptoms are referred to collectively as functional dyspepsia. Peptic ulcer symptoms, particularly abdominal pain and chest pain, may resemble those of other conditions, such as gallstones or a heart attack. Certain features may help to distinguish these different conditions.