Apparently our city water has a very high pH. I have used API Proper pH in the past to regulate it to 7.2, however, over a period of 2-3 water changes the pH sky rockets again. I have no real way of knowing just how high it is, because it just shows up as the bluest of blues on the color card (I use the master test kit, and I'm happy to say my other parameters have been zero for quite some time!). I have a male Tai Silk who seems to be the only fish affected by it, all the others seem to have adapted.
I'm just wondering...is there a "natural" way I can regulate the pH????? I really don't like having to add the chemical...
Thanks for your help