If the bathtub is 2 meters high, the water level in it will definitely be higher than your head! It is best not to exceed 1.5 meters!
Judging from the scale of geomantic omen, the highest can only be balanced with the heart position and the lowest can only be balanced with the knee position. Too high and too low have the following effects on fortune.
Too high-the water level in the fish tank is higher than the owner's heart, so the owner is prone to heart disease, unclear thinking and bad luck.
Too low-the water level of the fish tank is lower than the owner's knee, and the owner is prone to beriberi, and lacks the promotion of Feng Shui gas field, so he is unlucky.