Oyster Shell Fine Grind Oyster Shell Calcium Grit Grit For repeat customers, there are benefits, so please let us know in the comments before purchasing if possible. We are also listing the same item on Yahoo Flea Market. Fine grind is oyster shell of about 0.5mm to 4mm. 150g is about 180ml in volume. For calcium supplementation for small birds, chickens, etc. For adjusting the alkalinity of garden soil. For aquarium filter media and alkalinity adjustment. As chum for black sea bream fishing. We have listed it even though we can't think of any other uses. For those who want to give it to finches, society finches, Java sparrows, etc., especially small parakeets, we can also sift it to 0.5-2mm for those who only want small sizes, so please send a message. Prices and quantities are as follows. If you need more than 200g, please tell us the desired amount in the comments. We will change the price. We have plenty of stock. ●150g: 300 yen ●200g: 330 yen ●300g: 390 yen ●400g: 450 yen ●500g: 500 yen ●750g: 640 yen ●1000g: 760 yen ●1500g: 1000 yen ●2000g: 1260 yen ●3000g: 1700 yen We also sell items by grain size. If you wish, we can also include samples of coarse grind or powder as a trial, so please comment. After washing off the salt, it has been heated and dried at around 500 degrees Celsius for sterilization. The main component of oyster shell is calcium carbonate. Ingredients: Oyster Shell (Miyagi Prefecture) Alkalinity 50.0% Nitrogen...0.2% Phosphoric acid...0.15% Potassium...0.03% Calcium...94.8% Magnesium...0.40% Silica...3.09% Also contains trace amounts of manganese, boron, zinc, copper, iron, molybdenum, etc. When used as feed for living creatures, oyster shell has no expiration date or best-by date, but as a precaution, please use it within 2 years of opening.