Growth of algae in your saltwater tank can be a frustrating problem to deal with. Spores of the algae can be present in your tap water and also in the sand or live rock commonly used in saltwater aquariums. Implementing a few simple steps will help you to get your algae problem under control and keep it controlled.

Some types of algae found in a saltwater aquarium are beneficial and can provide nutrients to your fish, so it is important to research before you destroy. Red algae are an example of this type, not to be confused with red slime algae. There are many pictures available online to help you identify the type of algae in your tank.

Bubble algae can be removed from your aquarium fairly easily. Simply pull the algae off of anywhere it may be growing and discard it. Care should be taken not to release algae spores when doing this, however. If you are able to remove the rocks and other objects from your tank that are affected by bubble algae, then do so before removing the bubble algae. The rock can be gently rinsed with water after removal and before being put back into the tank to remove any remaining spores.

Compounds made up of silicon, oxygen, and metals, known as silicates, can be found in many types of sand. If you are using commercially packaged decorative or play sand, these will probably contain silicates which are contributing to your algae problem. Use sand that comes from the ocean instead and it will help reduce the amount of algae in your tank.

Levels of nitrates which are too high can also contribute to algae growth. It is a good idea to purchase and use a test kit to determine if this could be a main source of your algae problem. Check the sea salt you are using in your tank also, to ensure that it does not contain high levels of nitrates. Switch to a brand with lower levels if it does. Do not over-feed your fish, as this will contribute to higher levels of nitrates also.

Be careful not to add excess nutrients to your tank. This is tempting to many saltwater fish owners, because they think the fish will thrive and be even healthier. In reality, you are probably feeding the algae instead. Water changes of no more than 20% per day will help to reduce or eliminate the amount of algae also. It is very important that you never change more than 20% of the water in one day, because by doing so you could harm or even kill your fish.

Water that has been purified using reverse osmosis is another option for reduction of algae. Additionally, by using this purified water you can be sure you are not introducing harmful contaminants to the environment in your tank, meaning your fish will be healthier.

Keep your aquarium away from direct sunlight, and limit exposure to the hood lights according to the recommendations for your particular fish. Too much light exposure will encourage algae growth.

Emerald crabs love to eat algae, and can make a beautiful addition to your saltwater aquarium. Be sure to find out if your fish are compatible before adding this creature.

Surgeonfish and Rabbitfish are also helpful in controlling algae, as it is one of their food sources.