My RO system reads 0 on everything beside the PH, which is 6.4. i dose 2tsp of baking soda in my 50g during water change to bring the KH to 2dgh. GH is also increased by adding Ca and Mg to desired levels. i add 1-2tsp of Ca and 3tsp of Mg during water change only.I've recently switched to RO water from LFS. What parameters should this water have? PH=7, GH=?kh=?, TDS=0 etc..ect...any help much appreciated.