if you add kalk should your Ph go up?

[sumpfinfishe]

Hi Ross, this is perfectly normal if too much is added too fast.

Also by the way, I run my kalk on a drip system for 2-3 days out of every month and a day or two after the drip cycle has finished my PH returns back down to 8.2

Just be careful, as a fast PH swing can be really stressful or fatal on not just fish, but inverts and corals too That's why it's best to add a disolved mixture of kalk and top off water by drip line or by adding small amounts of disolved kalk into the sump, rather than directly into the tank.

cheers, Rich