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.
A peptic ulcer is a sore on the lining of your stomach or duodenum. Rarely, a peptic ulcer may develop just above your stomach in your esophagus. Doctors call this type of peptic ulcer an esophageal ulcer. Causes of peptic ulcers include. 1  long-term use of nonsteroidal anti-inflammatory drugs (NSAIDs), such as aspirin and ibuprofen. 2  an infection with the bacteria Helicobacter pylori (H. pylori) 3  rare cancerous and noncancerous tumors in the stomach, duodenum, or pancreasâknown as Zollinger-Ellison syndrome (ZES)