I tested my water PH and it is quite soft. It has a PH of 6.7-6.8. I used to have a water softener, but I bypassed it. I use bottled water from a pet store currently for my betta, however I want to use my tap water if it is possible to do so. The bottled water is very expensive and I also have to set up a much larger tank for some fish I am moving into my new house from my old one. Some people suggested that I use crushed coral or limestone to increase the PH. I’m not very familiar with doing that so if anybody could give me some directions on how to use them to buffer my water, I would really appreciate it.