Proper aquarium care involves maintaining a clean and healthy environment for fish and aquatic plants. Regularly check water parameters such as temperature, pH, and ammonia levels to ensure they are within safe ranges. Perform partial water changes weekly to remove toxins and replenish essential minerals. Feeding your fish a balanced diet is also crucial. Use high-quality fish food appropriate for the species you have. Avoid overfeeding, as this can lead to water quality issues. Additionally, monitor for signs of illness and keep the aquarium equipment, like filters and heaters, in good working condition to support a thriving aquatic ecosystem.