Nice job and it seems like things are coming along rather well thus far!
As for your pH being to low, dosing with Kalkwasser will definitely help as kal creates a rise in alkalinity(as well as calcium). This rise in alkalinity will help to increase your pH as well! Since kalk has a pH of nearly 12, you should be able to get that up! You may have too much CO2 in your water...as a result, you got it, a low pH! This can be cause from too much CO2 in the room housing your fish tank(respiration from pets and humans as well as gas appliances, or little air exchange to the outside can also contribute to too much CO2. Your caulerpa and Chaeto should help, however, with photosynthesis and having a refugium with a reverse daylight lighting scheme will alleviate a drop in (DO)Dissolved oxygen and an increase in CO2 at night due to your main lights being off. Dosing your kalk at night will only help as well. Just be careful when dosing kalk so that your calcium level doesn't become too high, or your alkalinity level can become depleted! _________ 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 Cerianthid Stars Hermits snails Zoos shrooms Montipora Brains Gorgonians Favia Turbinaria Kenyon Tree Acropora Xenia Tridacna (CroceaMaximaSquamosa)
"IF THE PHONE DOESN'T RING...IT'S ME"  jb
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aka parrothead | 
Got a fish tank that you are proud of? Post some aquarium pics with descriptions here so we can check it out! Journals welcome!
