While drinking from the tap in any areas is certainly not bad, don't pretend like it's a pure aid. The reason why you must have the right filter in your pond for your koi is that any improvement in the water environment of one's fish may bring about its sickness and fatalities. http://3081089Em4.Wicp.vip/ambrosebromilo/gravity-water-filter2066/wiki/Feng+Shui+Cures+For+Health+And+Purification