Dripping Kalk has numerous advantages- I just ordered a rebuilt hospital peristaltic doser for about $59 instead of the annoying drip box I have (waiting impatienly for UPS). Short term tho, you can get a pH buffer additive (the powder is cheaper than the liquid) that will raise it in a day or two. If you are using RO/DI water for top-offs, its generally pH neutral, so you neeed something to bring it up to 8.2 anyway- either an additive of Kalk.