5 Common Reasons Why Your Fish Tank Turns Brown

If you’ve ever tried growing live grows before, in fact, you will run into the problem of brown foliage, brown stems, or indeed dead grows!

Why does our fish tank or aquarium turn brown?

Here are some of the most common reasons why your fish tank or aquarium is turning brown:

1. Not proper light

Of all the reasons we have to deal with brown fish tanks or aquarium grows, low light layers are probably the most common reason.

Many low light grows as well as Java Fern and Anubias can get by with the dimmest of fish tanks or aquarium hoods. Furthermore, most grows will actually wilt beyond adequate lighting.

Grows generally start by dropping the lowest foliage that is furthest from the light and then they take on a stringy appearance. If you identify that this pattern is emerging, it is clear that your lights are not strong enough.

It is also essential that you provide the correct spectrum for your grows. The intensity of the light is only part of the problem. You also feel the need to supply PAR (photosynthetically active radiation).

It is not good to supply fresh liquid grows with high-intensity marine actinic lighting; it is the wrong spectrum. Instead, you should look for full-spectrum LED and fluorescent lamps. Specifically LED lights; Modern appliances are not only so reasonably priced, but they are also energy-efficient and long-lasting.

The type of plant you are growing also affects the intensity of light they need. In fact, a good full-spectrum light condition can cause low-growing carpeting fish tanks or aquarium grows to wilt anyway if they are excessively far to make a good apply of the outlet.

2. Nutrient deficiencies

Nutrient deficiencies are probably the second most common reason fish tank or aquarium grows to turn brown. In fact, if your lighting is strong, the need for certain elements and chemicals to survive grows, just like animals.

Fish can supply a large amount of these essential elements through their waste, and not all of them. A good fish tank or aquarium plant substrate is not only enriched with essential elements but can also bind to free-floating molecules to keep them in the area until the grows absorb them onto their roots.

3. Brown Algae

Look carefully at the foliage of your plant. Is your fish tank or aquarium growing so large that it turns brown, or are they covered in dust, rust, and a brownish coating? You may be dealing with a brown algae infestation!

The most familiar green algae are produced by microscopic single-celled organisms and cyanobacteria. Brown algae, on the other hand, are brought in by organisms called diatoms.

Technically, they are not grows besides an assortment of phytoplankton that is actually very useful.

Diatoms are estimated to generate between 20 and 50% of the oxygen we breathe.

However, in the fish tank or aquarium they are less useful as they cover every surface with a rusty brown slime. While they are not strictly harmful, they do look terrible and reduce the amount of light your grows takes in. There are also a couple of algae eaters that consume brown algae. Instead, you will feel the need to try physical or chemical means to remove them.

4. Animals eating  your grows

Herbivores are another reason why your grows can turn brown. Do you have fish in addition to cyprinids (barbs, danios, goldfish), silver dollars, molles, and different recognized vegetarians? These fish love to nibble on soft grows, as well as Cabomba and Anacharis; These grows are in addition to having a floating salad bar ready.  While it is good nutrition for fish, fish can graze long before they begin to suffer.

Silver Dollars have large, crisp teeth that allow them to consume not only the foliage, but they can also cut the stems down to the ground. In fact, the hard and bitter grows, as well as the Anubias and the African Liquid Fern, will in fact be eaten by them!

Fresh liquid snails are a bit tricky. In fact, most do not consume fresh grows if given the decision. They choose a lot of dead, slightly decayed foliage, food scraps, and various debris.

However, if they have nothing else to eat, they can turn to fresh greens, specifically apple and rabbit snails.

So if you start to identify your snails by cutting the foliage, simply feed them sinking pellets or blanched vegetables, as well as spinach or zucchini. These veggies are softer, already dead, and will attract all of your snails to the table!

5. The plant demands to establish itself

Believe it or not, grows is capable of stress! Most grows so hate to being moved; So far they are rooted somewhere where they don’t, in addition to being displaced.

If you have goldfish or cichlids that, in addition to digging and plucking them from the substrate … Or you, as an aquarist, are trying to move them nearby trying to find the excellent arrangement for your planted tank.

They may start to brown and wilt as they shift internal resources toward survival. Cryptocorynes are specifically infamous for this. Not only do they turn brown in addition to the foliage, they actually dissolve in just a couple of days.

They will usually only lose a little foliage, plus sometimes the entire top of the plant browns and dies! Fortunately, it will actually recover and rise the recent foliage.

So beware of sudden changes in fluid parameters or frequent close-up of your grows. Grows must remain quiet and thrive with stable demand!


Unfortunately, there are many possible reasons why your fish tank or aquarium is turning brown. Fortunately, they are mostly not difficult to fix. Whether it’s from a lack of light, supplements, algae problems, predators, or changes in parameters. Grows are such hardy organisms and they will recover quickly until you solve the mystery!