I have a 80 gallon with a 40 breeder sump at 100g total volume. Tank is 1 1/2 yrs old. I Dosed soda ash for alk but sand started getting really hard so I switched to sodium biocarbinate around 6 months ago. Just got over a Dino outbreak and Dino x or at least I think I’m over it. Anyway, someone told me to try Kalk to help avoid Dino’s so I’m using 2 tsp per gallon of Kalk in ato and levels dropped from 9.5 to 8.2 in 24 hrs. So I turned doser back on with 2 part. Now 24 hrs later my alk dropped from 9.4 down to 8.9 dkh. Doser is set at 12ml 10x a day so 120ml per day of sodium biocarbinate. Question is is this a normal amount of daily consumption for a low stocked mixed reef tank. No colonies just frags and 6 month old frags. A lot of corralline algae though. I have some hard sand also that’s why I’m concerned. But it could be hard sand I didn’t fully get out a few months back when was having the issue with soda ash. Should I stop the Kalk dosing and just stick with 2 part like I know. There just seems to be many benefits to Kalk.