Unless they forgot to add carbonates to your batch of kent, it will just take some time before you notice a rise. It is possible that you were bottoming out on alk
, and now with dosing 7.25 mL a day, you are just keeping up with consumption. I see no reason why you couldn't dose a bit more of it and see what happens.
Ultimately, this isn't a product you can use once and expect things to remain balanced. If your tank is consuming carbonates, your alk
will drop daily unless you supplement it daily.