Question: But I would have written this it would probably not have time to read before the grades are added
Please fix the punctuation.
Fixed: [But I would have written this it would probably not have time to read before the grades are added.]

Question: Although this video already has almost a couple of months for many readers will be new
Please fix the punctuation.
Fixed: [Although this video already has almost a couple of months, for many readers will be new.]

Question: It serves to improve the life and health of the fish It helps to decompose organic substances and improves the functionality of the filters
Please fix the punctuation.
Fixed: [It serves to improve the life and health of the fish. It helps to decompose organic substances and improves the functionality of the filters.]

Question: Each person also has an individual balance of Yin and Yang
Please fix the punctuation.
Fixed:
[Each person also has an individual balance of Yin and Yang.]