OK i was reading a thread now now about topping up with RO water and i think it was jacquesb that said one must add kalk to the RO?
firstly what is kalk?
secondly ive topped up with about 75 litres of R.O already and P.H is still 8.4
lastly is kalk expensive? cause this hobby is too much$$$ already
firstly what is kalk?
secondly ive topped up with about 75 litres of R.O already and P.H is still 8.4
lastly is kalk expensive? cause this hobby is too much$$$ already