My pH is rising even though I have Aquasoil
I have a planted 10gallon and using aquasoil amazonia I as substrate. When I first started the tank the pH was around 6.5. Then I put a purigen pouch in the filter to remove tannins from aquasoil and I guess it raised the pH. However, the purigen has been out of the tank for like 2 and a half weeks and I am even using a different filter. The pH is reading about 7.6 right now, and I am adding some CRS/CBS so I know they need a lower pH.
What should I do? I have some Seachem Natural Regulator I can try since it says it will lower pH to 7.0.