Salt water against Freshwater Aquarium: 7 Legendary exposure-the world of fish farming

If you are interested in raising fish, you probably have caught a lot of myths about the difference between saltwater and freshwater fish tanks.

“Saltwater fish tank more expensive…”

“Beginners shouldn’t start with salt water tanks…”

“Salt water aquarium grows more algae…”

For a variety of freshwater fish players, saltwater aquariums feel like a strange and mysterious world of intrigue and secrecy!

In today’s article, we will discuss 7 of the most common myths about saltwater compared to freshwater aquarium and debugging is true and false.

Myth 1: Freshwater aquarium is easier to maintain

Freshwater water TankPeople give many reasons why freshwater aquariums are easier to feed than saltwater fish tanks. The main reason is maintaining the condition of the aquarium; Let me explain

Think of a natural freshwater environment compared to the saltwater environment.

In the oceans, the state of water (pH, salinity, chloride, etc.) is hardly changed. This means that daily living conditions of saltwater fish are usually unchanged. It is still quite stable over time. Basically, the ocean is known for its stable and steady water chemistry.

Now let’s compare this to a freshwater environment.

Most freshwater environments undergo cyclic changes such as flooding and drying. These cyclic changes affect the chemical composition of the foreign temperatures of it. The freshwater environment is mainly known for its inconsistently and dynamic water chemistry.

Therefore, fish living in freshwater environments evolved to survive under various water conditions (5 to 9 pH). Saltwater fish can only exist in very special water conditions (pH 7.8 to 8.4).

Freshwater fish are often much harder. You can make small mistakes with water chemistry in your freshwater aquarium and keep away from it. While a slight defect in saltwater fish tank can be fatal due to the tight tolerance of the water conditions that saltwater fish need.

For this reason, it is common to accept that freshwater aquariums are easier to maintain because you do not have to hold water conditions in such a narrow threshold.

Myth 2: More expensive saltwater fish tank

Let’s start at the expense of a saltwater aquarium compared to a freshwater aquarium.

It is often said that freshwater aquariums are much cheaper than their saltwater fish tank on both set and operational costs.

Isn’t that true

Below I have broken down the startup cost for a freshwater aquarium and a saltwater aquarium (all 50 gallons). Please note that this is only applicable to a fish system. Although it’s just an estimate, it gives you a good indication of what to expect.

Saltwater Fish Tank Freshwater Aquarium
Aquarium $50 $50
Surface (sand/gravel) $45 $20
Live Stone 100 dollars There is no
Salt $25 There is no
Filter $25 $50
Driving Head $50 There is no
Cream Separation Protein $150 There is no
Light $50 $50
Water tests $70 $50
Hospital/Isolation Tank $25 $25
Total Cost: $590 $245

The problem in the table shows that the installation of saltwater aquariums is twice as expensive as that of freshwater tanks. The main reason for this is that you have to purchase more equipment such as powerhead, protein skimmer and live stone.

Another important point is the cost of buying your fish. Of course, the actual cost will depend on the specific fish you buy. However, you can often claim that buying saltwater fish is more expensive than buying freshwater fish.

Most freshwater fish can be purchased for a price of 1 to 10 dollars, while saltwater fish start at 10 to 20 dollars, and certain species cost more than $100 per child.

Finally, the operating costs of a saltwater pool are a bit higher, as the water test kits tend to be more expensive and you have to buy salt.

So, generally there are Saltwater fish tanks tend to be more expensive than comparable freshwater.

Myth 3: Beginners shouldn’t start with salt water tanks

Saltwater FishIf you’ve ever worked with an aquarium fish player or have read a beginner’s guide to fish farming, you’ve probably caught the following quote: Beginners should not start with saline water tanks.

There are a number of reasons why people say this: cost, complexity and cognitive difficulties.

First, as discussed above, saltwater fish and water tanks are often more expensive than their freshwater equivalents. When beginners, you will almost certainly make mistakes and lose the fish. The idea is that you should learn and make mistakes on an aquarium/fish cheaper so that you don’t waste a lot of money. That’s why people recommend fresh water because of their ability to pay.

Secondly, you must consider the complexity added.

The additional “complexity” of saltwater fish aquarium depends on the type of aquarium being planned (only fish, fish only with live stone or reef). If you’re planning a fish-only nano tank (less than 30 gallons), there’s really no hassles to add. While there is a lot of additional complexity in a FOWLR or reef aquarium.

For this reason, we do not recommend beginners with FOWLR or reef tanks. However, an aquarium with only saltwater fish is fine.

After all, people think that the saltwater fish tank is harder to maintain. In general, we will say again that this is not the case with the beginner tank. They definitely require more maintenance, but it’s not harder. You just need to change the water and clean the tank more often than freshwater aquarium.

We will say that if you understand the nitrogen cycle, know how to check and change water and diligently change water, a beginner can start with a saltwater pool.

However, we will add a limit and indicate that it must be a small fish tank with only the fish. You should also start with the hard saltwater fish like clown fish and avoid sensitive species.

A beginner can start with a salt water tank.

Myth 4: You can’t turn salty water into freshwater aquarium

Saltwater Fish in AquariumsThis particular myth is my favorite:

You cannot convert a freshwater tank into a saltwater pool or vice versa.

This particular myth is wrong;; You can completely convert a fresh water tank to a saltwater pool or vice versa. You just have to make some adjustments.

Converting a freshwater aquarium into a saltwater fish aquarium is the easier choice. All you have to do is empty your tank, rinse everything and wipe it clean. Make sure you use warm water with no chlorine when washing the tank. You will also need to replace all filters and substrates with the new filters, and then you can start a new cycle.

Keep in mind that you will also need new accessories with salt water containers such as protein separator and power head.

Converting a saltwater aquarium into a freshwater aquarium is a little tougher, but not too tired. Rinse the tank again and wipe everything with warm water, without chlorine.

You need to make sure that the salt is completely removed from the tank and accessories before driving in fresh water.

Myth 5: You can be breeding both in captivity

Raising fish in captivity is certainly not something that beginners regularly do. However, it is often believed that saltwater fish farming is as easy as freshwater farming.

That’s wrong.

Freshwater fish are known to feed in captivity, and in fact, many beginners report success in the breeding of their own freshwater fish.

Saltwater fish, however, have very strict requirements for breeding. They tend to multiply during seasonal changes and when there is no seasonal change in captivity. Virtually impossible to change seasons in your aquarium.

Since saltwater fish farming in aquariums does not receive these seasonal mating signs, they rarely produce a breeding environment.

That is why saltwater fish have a higher price than freshwater fish. Saltwater fish you buy are usually caught in the wild, while freshwater fish are kept captive.

If you want to feed fish for reproduction, I recommend using freshwater fish.

Myth 6: Saltwater fish tank with algae

Algae Saltwater Fish TankThis myth is absolutely true and in fact one of the reasons why people say beginners should not have saltwater fish tanks.

Both in freshwater tanks and in saline water tanks, compounds such as ammonia and nitrate are formed in the nitrogen cycle. Algae need these compounds to grow.

However, there is a major difference between fresh water and saltwater environments: Plant!

There are many plants in a freshwater aquarium and they need algae-like nutrients to grow. This means that plants, not algae, consume nutrients. Therefore, the algae are deplete and their growth is severely restricted.

While plants are difficult to get in saltwater fish tanks. As a result, you will often not find many plant saltwater fish tanks. This means that the nutrients in the water are not consumed and the algae grow.

However, it is not all bad news for those saltwater fish players!

You can completely stay on the algae and prevent them from damaging your tank. You just need diligent maintenance. In addition to operating the protein separator, you need to change the water regularly and clean the tank.

With the condition that you monitor the maintenance, algae no problem for saltwater fish tank. However, the truth is that saltwater fish tanks tend to grow more algae than freshwater aquariums.

Myth 7: Saltwater fish tank must be bigger

The myth that saltwater fish tanks must be partly larger is true. Let’s get a closer look

Saltwater fish tend to occupy more space than freshwater fish.


It has everything to do with oxygen.

Salt water can not contain the same amount of oxygen as fresh water. Research shows that seawater only contains about 80% of the oxygen that fresh water provides.

What does this mean with your aquarium?

This means that the salt water tank contains less oxygen than 20% with the same tank with fresh water and salt water.

In simple words, you can not keep the same number of saltwater fish and fresh water in a fish tank in the same dimension because water does not contain enough oxygen for saltwater fish.

Saltwater fish simply runs out of oxygen.

For this reason, everyone accepts that saltwater fish tank needs to be larger. However, it is not because of the oxygen content in the salt water decreases. You should

By the means, many freshwater fish players may be disappointed with their first saltwater aquarium because they can’t fill it with as many fish as before!

If you are unfamiliar with fish farming and have limited space, I will propose a freshwater tank as you can feed a larger number of fish in a smaller tank.


I hope this article has helped to remove some myths surrounding saltwater and freshwater aquarium.

My favorite legend is that new fish breeders can’t get started with a saltwater water tank!

The saltwater fish tank seems odd to beginners using freshwater aquariums, but it is practically not so. You only need a few small changes and your saltwater fish tank is ready to use.

However, keep in mind that saltwater pool really requires more maintenance time. So plan accordingly.

Let us know where is your favorite legend in the comments section below, or it is better to tell us a new story…

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