just did a water change about 5 pm. It is now 10 pm. The ph was 7.8. I added Seabuffer and the ph hasn't changed much. Do you have to add more or wait a day for it to show up higher on the test kit.
I use Seachem Marine Buffer occasionally and I add it slowly over the course of an hour or two to protect my inverts. Anywhoo, it has always brought the pH up as soon as I've added it.