Sorry, but I write in English. I have a pond in my garden with about 70 fish, I say about, As They keep moving and are difficult to count Exactly. I live in Italy and have used for several years now thesis sticks - before I used Tetra flakes. The cost of a 10 liter tub of sticks in the shops is around 32, it makes sense to buy the larger 50 liter pack, Which, even with the cost of delivery quietly works out cheaper. Now, speaking from my fishes' point of view. They too are happier with the larger packs, as they like the tasty sticks anyway and as a bonus, They find thatthey get to Extra Helping Each Day. The delivery cost is too high in my opinion, but if you want you must pay. My fish sticks give the 5 stars as They are Happy With Their meal and can not wait to get more every evening. Delivery was first class, but as stated too costly.