1.The protein skimmer can remove the organic wastes almost as soon as they are formed in your aquarium. That means, you are able to eliminate them before they are disintegrated by the bacteria in the tank into nitrogenous matter. Nitrogen in the tank can be harmful, as it will interfere with the properties of the water and even get converted into toxic forms that could be life-threatening to the inhabitants of the aquarium.

2.If you are continuously removing the organic protein wastes from the aquarium with the skimmer, it is obvious that the aquarium will not require frequent water changes.

3.Apart from the protein wastes, the protein skimmers are also capable of removing fatty substances that collect in the tank and some carbohydrates. Even organic molecules containing elements like copper can be eliminated.

How do you choose a Protein Skimmer for your Aquarium? But, though a protein skimmer is a very essential device, it is also one of the most expensive additions that you will make to your aquarium. That is the reason why you should buy the most suitable skimmer, as it will be a one-time expense you will make. A good protein skimmer will also be durable and will be with you for a long time.

Here are the different types of protein skimmers that are available in the market. You can decide what to buy after understanding the types available.

1.Co-current Protein Skimmers ? Co-current protein skimmers are called so because here the water from the aquarium is made to move only in one direction (upwards), and the bubbles move along with the flow of the water. The exchange of wastes is done between the water and the bubbles as both move towards the top, side by side.

2.Counter Current Protein Skimmers ? In counter current protein skimmers, the bubbles move downwards for a while as the water moves in the upward direction. The bubbles move downwards for some time, till the exchange takes place and then they take the waste matter to the cup on the top. The advantage is that the counter current mechanism facilitates for better contact between the dirty water and the bubbles and hence more effectiveness.

3.Circulating Current Protein Skimmers ? These are a new development, in which the mechanism is the same, but the water is made to enter into the protein skimmer a number of times through a circulating device. This increases the time of contact and ensures a high degree of purification of the water.

Your choice of protein skimmer will certainly depend upon the type of aquarium and the budget. The co-current protein skimmers are the cheapest, and they are quite effective for small size freshwater and saltwater aquariums. Prices are high for the counter current variety, and the circulating ones are the costliest. But it you have a very large aquarium, like the ones they keep in commercial places, you will need a powerful protein skimmer. In such cases, counter current and circulating current protein skimmers become essential.