Aquarium Fish Tanks Seawater Large Particles Dog Bone Degradable NP Biological Bean Machine Filter Material Condition: Item Type: NP Biological Bean Material: Polymer Plastic Color: As Picture Shown Quantity: 1 Bag Net Content: 300ml Weight: Approx. 485g Use suggestion: 1. Conserve enough water to stir the bio-np beans to avoid hydrogen sulfide gas 2. The use of ozone or UV will affect the biological supplement, prolonging the maturation time, generally speaking, the addition of culture agents can alleviate this problem 3. Prior to the use of biobeanies, such as in cases where nitrate and phosphate levels are already very low, it is possible to detect a decrease in supplemental NO3, PO4 with a labeled test machine 4. NP doug system is mature and can keep the tanks low nutrient level, rather than completely without nutrient, but also can support more coral grain feeding amount, corals get enough food, the nutrient levels dropped to a very low state, strongly recommend the use of all kinds of food to provide energy for coral, coral maintain their healthy. Adding mode: For every 200L water body, the amount of biobean added is 200~400ML For every 100L water body, the amount of biobean added is 100~200ML For every 300L water body, the amount of biobean added is 300~600ML