Hi! Small amount of decorative white sand (beach sand) was used in a 5g planted tank. It raised the KH to 8dKH. The tank is on its 3rd day and so far all seems ok. But comparing it to my 50g tank which only reads 3dKH, it seems that the KH level in my other tank is too high. What are your thoughts on this? Will this work? If not, is there a 'practical' way of lowering KH? Thanks!