My CRS tank's pH is still over 7 despite having colombo and 100% RO. I think the culprit is the landscape rock i had in it for a about 3 months when i first set up up a few years ago. Ive tried kapta leaves but its still over 7.
I was wondering if distilled vinegar would be a safe option to lower the pH of the tank?
I was wondering if distilled vinegar would be a safe option to lower the pH of the tank?