Properties: yellow lump ingredient: high quality carbon, nitrogen and inorganic salts Specifications: 500 g / bag Usage: 1. dosage 4 ‰, for example, the product 1 package (500 g), can be watered 100 liters, plus 20 liters of photosynthetic bacterial species. 2. The medium, water and bacteria in proportion with a good, into a solid plastic bucket or plastic bag sealed. 3. The culture was light 1500-4000 LX (ordinary sunlight or 40-100W incandescent), the culture temperature is 28-35 ℃. Note: 1. Use a lower water containing bacteria culture of clean fresh water, high exposure to chlorinated water should be placed two days after use. 2. If using ordinary daylight illumination against the proposal to reduce the amount of water to 80 liters / bag, plus 20 liters of photosynthetic bacterial species. 3. Medium blocky not affect the use, watered dissolved. 4. run out as soon as possible after opening the bag, the bag must not run out of the seal. Using photosynthetic bacteria: 1. Fry: General fry about 60 kg / mu (depth of 1 meter), crabs seedlings of about 80 kg / mu (depth of 1 meter), spat of about 100 kg / mu (depth of 1 meter), use period of 5-10 days. Adult fish: first invest about 7 kg / mu, after each 3-4 kg / mu, a period of 10-15 days. 2. The photosynthetic bacteria diluted 20-30 times evenly sprinkle the entire pool. 3. can not be used simultaneously with antibiotics, disinfectants, water disinfection before use shall be for a week. 4. On a sunny day when the water temperature is above 25 ℃ better results.