If you are knowledgeable about aquariums, you won't have much difficulty maintaining a tank. You can keep all kinds of fish in your aquarium if you know how to care for them. There are several points that you need to know to improve your fish farming skills.
An important point is the support of the fish osmoregulation system. This is a system in which the fish's body maintains a balance between salt and water concentrations. You can also look for tunze osmolator 3155 via https://www.marinedepot.com/tunze-osmolator-universal-3155-auto-top-off-ato
If you cannot understand why your fish is deteriorating, it is necessary to check the pH and salt concentration of the water in the aquarium. Salt concentration determines the degree of osmotic pressure, high concentration causes higher osmotic pressure. This causes the fish to work harder to regulate the salt levels in their body.
The ecosystem in which the fish resides determines the level of osmotic pressure it can withstand. Saltwater fish can withstand higher osmotic pressure than freshwater fish. Some fish can live in one of the waters.
Once you have determined the shape and size of the tank, as well as the types and numbers of fish that need to be housed in it, find ways to maintain the pH and salinity of the water. This is a quick way to switch from a temporary tank to an aquarium.
So check the water to make sure it's not too salty or too low in salt. The water must be suitable for the fish to grow and be healthy. Fish are very sensitive organisms and if not cared for properly, they can die before they become adults.