Can the gravel used in the goldfish bowl be mixed with soil to grow vegetables?

Look at your sand. It should be neutral river sand, slightly cleaned and ground, with a PH of about 7. In theory, you can grow vegetables with soil. However, sand is sand, not soil, which is equivalent to killing chickens with a knife. Yes, but only big ones can be used. First of all, although it is not harmful to plants, it is not good. This kind of sand has poor water retention and is not suitable for growing plants. Vegetables grow badly and sand is wasted.