Hello all, found this site about a week ago and i've been reading alot of stuff since. I am having some real problems with my PH and KH. Water stats are as follows: Salinity1.024 Nh4 lowest on test kit No3 lowest No2 lowest Iron none Phosphate none CA 360-380 ppm? unsure if that was right, but 18drops *20 per. PH off the chart, 8.7 is a dark blue my vials are purple KH is 240 , again with the drops 24drops at 10per Temp is 84-87 daily fluctuations, I know this is bad my chiller arrives tomorrow. Anyways i've done alot of reading up on this from all the great links on this great site, and I read adding vinegar to lower my PH was ok, so i did a 20%water change and poured a small amount of vinegar into my tank. Retested after 2.5 hours and PH was still purple (not dark blue) but it did seam like it was getting closer to the 8.7dark blue. KH was down to 210 ppm CA was still 380ppm and all other levels were still perfect. Also I now realize that I was using the Kalkwasser improperly(too fast) and thats what caused my KH, PH spike, my main question is what should i do? Thanks in advance for all the help guys. Also tank is a 50 gallon tall type and I have a 400w MH / 2 * 32W Pc actinic Pendant Combo, have cheap skimmer also. and like 80 - 100 lbs Live Rock.