I have read quite a few forums and web pages and have got very confused. The tap water in the area a live in is extremely hard. The GH and KH is out of the range of my testing kit but pH seems to be ok (~7.5-8). I am in the early stages of cycling and it is quite heavily planted with stone and some bogwood. I am very wary of water softening pillow as they can add Na+ ions to the water which I know are not great for freshwater fish. Tank is only 70L. Is there anything I can do to lower the hardness of my water and is it really necessary? I wasn't planning on keeping cichlids but hoping for the more typical tropical fish such as tetras and corys that I grew up with. I am not willing to invest in an RO unit. It it alright to use bottled water such as the cheap "table water"?