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Old 01-10-2010, 06:44 AM   #1
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KH confusion!!!!!!!!!!!!!!

Hi guys here are the results for the last 3 tests done last week to see what on earth is going on, I turned my Ca Reactor off last Sat to see the Ca drop however..............
Mon 4th (4am sample)
SG 1.025
PH 8.4
Ca +500ppm
Kh 13.44
Mg 1350

Wed (4pm sample)
Sg 1.025
PH 8.4 ish
Ca +500ppm but less than previous result
Kh 14
Mg 1380

Sat (half 9am)
SG 1.025/6
PH 8.4 ish
Ca +500 but less than all above
Kh 15.12
Mg 1380

I have not added ANY elements for a week/fortnight but my KH keeps rising on its own............ anything I can od to stop this or just let nature run it's course and all will be fine? I am concerned with my PH levels as I am aware that this all ties in with KH etc.......... I normally add KH builder to my RO water however have not done this for a number of top offs.........
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Old 01-10-2010, 08:26 AM   #2
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How old are you test kits and what brand are they? It's impossible for alk and magnesium to rise without being supplemented. I really question your alk readings. 15.12 dKH would kill or bleach just about every coral in your system.

I don't really see any SPS corals in your tank and they are what would use up the ca/alk that a ca reactor generates. Why are you running 1 in what looks like a low demand system?
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Old 01-10-2010, 08:44 AM   #3
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I did have an elegance, large hammer, couple of duncans, and a trumpet..... at the moment I have atorch which is fine..... the others died off so stopped with the hard corals for now. My test kit is Salifert and only bought it 2 weeks ago. I can assure you my KH is rising but I have not added any KH builder.......this is why I am confused......
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Old 01-13-2010, 03:32 PM   #4
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Okay guys here are the latest results of my tests and my KH is still confusing me!!!!!!!!!!!!!!!!

I have tested my RO water and levels etc are spot on I only replaced the filters 2 months ago so all as expected...........

Sat (half 9 am)
SG 1.025
KH 15.12
PH 8.4
Ca 620 ppm
Mg 1380

Sun (midday)
SG 1.025
KH 14.56
PH 8.4
Ca 600 ppm
Mg 1380

Today..........Wed 4 pm
SG 1.026
KH 15.008
PH 8.6
Ca 535 ppm
Mg 1350

I measured Strontium today and its a little low so dosed accordingly.......... problem seems to me is i am trying to bring down my KH which is allowing my PH to rise? AH!!!!!!!!!!!!
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