I've been dosing kalkwasser for years but I got lazy reading my alk levels since March... well , a week ago my xenia started shrinking and its polyps are not fully open then I check parameters and everything looks ok but the alk seems too high that I could not even test it: I added the reagent drop by drop until I got tired! then I got a new sample but I took 2.5 ml instead of 5 ml to get the results faster but nothing I stoped at 12 drops wich means something arround 24 dKH and the sample did not change color !!!! What can I do, the other corals look ok. I have about 20 colonies of xenia and I'm really worry... Thanks for any help.