how can i lower my kh????

[K_S_W_I_S_S]

what are all the ways possible to lower my kh????

[Matak]

I know firsthand that water softeners take out GH, but don't touch KH. The only thing I can think of is to dilute your water with safe water that tests lower in KH.

[Sumpin'fishy]

Place some peat in a mesh bag, container in your filter. This will tan your water a bit, though. You can also dilute with RO water or any water with a lower KH, as said.

Acids also naturally lower your KH and will drop pH accordingly.