Which appearance should water quality have during fertilization?

During the fertilization process of corals, the appearance of water quality is important to consider because it reflects the conditions that can influence coral health and reproduction. Clear, clean water is essential for successful fertilization and subsequent larval development.

When water appears as "weak lemonade," it suggests that there is a moderate amount of nutrients or organic material present without excessive turbidity or pollutants. This condition can promote healthy coral fertilization by allowing sufficient light penetration and maintaining appropriate water chemistry, which is crucial for the health of both the corals and their zooxanthellae (symbiotic algae).

In contrast, very clear and colorless water could indicate a lack of necessary nutrients, which might not support the fertility of corals effectively. A blue and transparent appearance might suggest clearer water conditions typical of some healthy reef environments but doesn't accurately convey the slight nutrient presence often associated with good fertilization conditions. Lastly, cloudy water with sediments often indicates pollution or poor water quality, which can hinder fertilization and negatively impact coral survival and growth. Hence, a "weak lemonade" appearance strikes a good balance for optimal fertilization conditions.