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.
common ulcer symptoms include a burning aching pain or a pain that feels like hunger between the navel and the breastbone the pain sometimes extends to the back belly pain that can last from a few minutes to a few hours and that usually goes away for a while after you take an antacid or acid reducer