So I've been trying to gradually lower my ph in my tank by adding API ph down once a day and it seemed to be working until I noticed that it went back up today from between 7.4 and 7.6 to like 8.2. I put some more ph down in there to get it to 7.6 again but at this rate, it will rise 2 steps forward each time and I don't want to add too much ph down in a day because the label warned about decreasing it by .2 in 24 hours. I shouldn't have any coral substrate the substrate package says that it does not affect the ph and I also have an Indian almond leaf in there. Ideally, I want my tank at 7 but it's always been over even when my tap ph is around 7. So why does my ph keep rising? Should I keep bothering with it? My ph has always been around 8 and my betta fish has been fine I think he's used to it by now but still, preferably I want it at 7 for him.