Excess CO2 will tend to cause pH values to decrease, even despite adequate alkalinity levels. That is the ruling for adding Kalkwasser during the day as kalk has a pH value of somewhere around 12. If you dose kalkwasser at night, it is best to administer ACETIC ACID(VINEGAR) AS WELL TO HELP TO ENSURE THAT YOUR PH VALUE DOESN'T GO THROUGH THE ROOF. _________ 125gal.w/Mag9.5 return(dual megaflow)>Mag7 pump Aqua Cev180skimmer.Wave2k Hamilton Reefstar(2)250watthqi(mh)pend.a Yellow, Naso Tang Red Lip Blenny Percula Clown Demoiselles Niger Trigger F. Wrasses Ceriantharia Orn.Shrimp and Stars Hermits Queen Conch asst. snails> Stars Zoos shrooms Montipora Brains Gorgonians Favia Turbinaria(large+small polyp) Acropora Xenia Tridacna (CroceaMaximaSquamosa) Leathers <35+75gal.reef tank as well> 
"IF THE PHONE DOESN'T RING...IT'S ME"  jb  |