The oxygen pump has vibration but no bubbles, indicating that it is not installed properly or the equipment is damaged. In this case, first of all, we should look at the installation position of the pump, generally above the water surface, if put too low, the pressure is relatively large, air can not enter, it can not produce bubbles. Secondly, we should shorten the length of the pipe, not too deep, and there should be no bends.
1. Floating head: Floating head is the performance of most fish when they are hypoxic. They will swim to the surface of the water, and their mouths will open and close at the place where the air and water are in contact, just like blowing bubbles. At this time, it is necessary to oxygenate immediately to improve the oxygen content of the water body, otherwise the fish may die because of hypoxia.
2. Anorexia: The vitality of the fish will be greatly weakened when it is hypoxic, and it looks like it has no spirit. When it is time to feed, if the fish does not come to grab the feed, it also shows that it is hypoxic. However, anorexia may also be due to fish illness, need to observe whether there is a rubbing tank and other performance, in order to further determine the cause.
3. Jumping the jar: Some fish will also jump the jar when they are short of oxygen. However, jumping the jar is not a particularly accurate judgment method. It also depends on whether they will float and whether they have anorexia. Moreover, at present, many fish tanks have lids, and it is rare to see jumping tanks.
