I have a betta in a 5 gallon tank with some plants, all of them are doing fine. However, I would like to purchase a Nerite snail to eat Algae, but my tap water ph is around 6.5 - 6.8, I was first thinking about buffering up the PH using Baking Soda, but I've never done it before and I was afraid it would harm the plants and my Betta, at the same time I also do not know how to keep the PH constant. I've done my research and what I could find is saying Nerite snails can't be in too acidic water because their shells would dissolve. So I assume just using egg shells would keep their shells healthy. If my assumption is wrong please tell on on how to keep a stable PH and what should I do.