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.
Signs and symptoms of esophageal spasms can include: 1  Squeezing pain in your chest, often intense, which you might mistake for heart pain (angina). 2  Difficulty swallowing (dysphagia). 3  The feeling that an object is stuck in your throat (globus).hen to see a doctor. The squeezing chest pain that esophageal spasms can cause can also be caused by a heart attack or angina. If you experience squeezing chest pain, especially if it is a new symptom, seek medical care right away to make sure it's not a heart problem. 1  Definition.