| Hi Mike,
If your pond and mains water both have a KH of 3, why would you need to raise it? From these readings alone, it is obvious tht your pond is either low stocked, little fed, extrememely well maintained, or all three. So, were you given one good reason for raising it to 5.5???
KH is there for the purpose of keeping the pH buffered. There is absolutely no benefit to raising it higher that necessary to achieve this. Some poeple have said that the filter needs KH... which is rubbish. The biomass don't feed on KH, but simply produce acids that try to lower the PH, which are then neutralised by the KH. The Koi don't use KH either. Sure, they need a little calcium, but this wouldn't be obtained from the KH anyway. This is soooo frustrating!
Mike. |