2. Avoid over-breeding: Although black koi fish is rare, and the meaning of geomantic omen is good, we can't breed too many black koi fish at home, because too many black koi fish will suppress our fortune in turn, and too many black koi fish will have higher demand for our financial resources and energy, so it is enough to breed one or six as far as possible.
3. Don't put it in a fierce position: whether it is red koi fish or black koi fish, it has a positive role in promoting Feng Shui. Therefore, in order to ensure that koi fish can play its feng shui role, we'd better not put it in a fierce position, otherwise it will not bring good luck to our family, but may bring bad luck.