I have a question about the calcium depletion in my 120. I check my water parameters weekly or close to it and the calcium never looses more then 20ppm and alk
may drop 1.1dkh. Now last weeks tests were salinity 35-p.h.8.2-nitrite0-amonia0-nitrate0-calcium440ppm-alk9.5-temp80 and if you care about kh11. now this weeks salinity35-p.h.8.2-nitrite0-amonia.25-nitrate0-calcium330-alk7-temp80 and if you still care kh13. The only new addition to the tank is a saddle carpet nothing has died I replaced the carbon and cleaned the tank the day of the first tests but only 10%. Tank inhabitants are 3 tangs, madarin dragonette, neon goby, skunk cleaner shrimp, orange linkia star, tuxcedo uchin, pink pincusion somwhere around 50 blue leg hermits and 4 snails also small bubble tip orange ricodia 7 other small unidentified ricordia and around 25 red mushrooms. I also have added 1 maxi-jet 1200. I guess when I look back over my records that a 50ppm calcium drop after water change is normal scince I dont add calcium to change water but I will start now. I also drip kalkwasser daily close to 2 gallons. Anyway what is eating the calcium in my tank?