Things You'll Need
- Coral
- Tap water
Instructions
House the aquarium away from any windows, especially those that receive direct sunlight for more than eight hours a day. Restricting the amount of sunlight the tank receives cuts down on red algae growth.
Provide the aquarium with no more than eight to 10 hours of artificial light per day. Turn off the aquarium̵7;s light to prevent the algae from receiving the nutrients it requires to thrive, and multiply.
Introduce coral to the saltwater aquarium. The coral provides competition for nutrients, making it difficult for the algae to thrive.
Feed the fish once a day. The excess food creates a greater amount of nutrients in the water.
Lower the amounts of phosphates in the water. Feed the fish flakes with low-phosphate levels, clean the filter regularly and fill the tank with deionized water, which is naturally lower in phosphate than tap water.
Remove any dead fish from the tank immediately. The rotting fish releases nutrients, including phosphates, the algae need to survive.