If you see any clumping you should manually stir up the reactor, just make sure what comes out of it goes into the skimmer. On the amounts you have in their its hard to tell with out being their to see the progress. What I usually suggest to folks is to take what they tell you, you need for the size tank and the start with 1/3 of that and then up it 1/3 more every month or so until you hit the target. BUT in saying that you kind of need to based that on testing and on things you see happening in the tank. So if your tests are telling you that you still have a higher level of P and N then move up, and if you notice algae growth, say more on the glass or on the rocks.
I would go with the Kalk dosing all night and day, that is adding to the swing in ph. You swing is not to bad but the tighter you can make it the better. Another thing is if you are running algae in the refuge make sure you know the pellets are going to be direct competitors with it.
Mojo