Reasons:
- Composition: Perlite is a volcanic glass containing aluminum, iron, sodium, potassium, and magnesium, which can disrupt the delicate chemical balance of the marine aquarium water, potentially causing harm to the marine life.
- High surface area: Perlite has a high surface area, which means it can absorb various compounds present in the aquarium water, including trace elements essential for the well-being of marine life. This absorption may deplete these elements, leading to nutritional deficiencies and health problems in marine organisms.
- Floating potential: Perlite is lightweight and porous, making it prone to floating on the water surface, which can disrupt the natural flow of water and gas exchange in the marine aquarium. This can adversely affect the respiration of marine organisms and impair the overall water quality.
- Abrasion and injuries: Perlite has a rough texture and sharp edges when crushed, which can cause abrasions and physical injuries to delicate marine organisms, particularly when they come into contact with the perlite substrate or other hard surfaces in the aquarium.