Dhayden Posted July 12, 2006 Share Posted July 12, 2006 OK I have been trying to nail this tank down. I just did a 20% water change on the 9th. My top off water is RO with PH of 8.8, Kh 0. Now..... 7/9 PH 8.1 Kh 13 NO3 5 Ca 560 Mg 1400 7/12 PH 7.9 Kh 13 NO3 5 Ca 500 Mg 1400 The Kh makes no sense to me. Now this is 930am I tested the PH vs. maybe 3pm so if that kinda makes sense right? does it go down at night? Ca makes sense and Mg has been stable for a while. I just did 2- 20% water changes 2 days in a row to see if I could balance the tank out. My Kh had been pushing 20. Might have to ask Randy this one. Kh isnt supposed to go up right? On its own heh.7 Quote Link to comment Share on other sites More sharing options...
hammondegge Posted July 12, 2006 Share Posted July 12, 2006 OK ph/Kh experts figure this out NOT HEREI would guess that one off the tests was off a little. what is the dkh of the fresh saltwater. the effect of the water changes will diminish as you approach the target dkh. at 13 you should probably just wait a couple of days until it drops to 11 and then resume dosing. if you test daily you can get a pretty good idea of what the tank is consuming and adjust your dosing accordingly Quote Link to comment Share on other sites More sharing options...
GKarshens Posted July 12, 2006 Share Posted July 12, 2006 You will definitely get a swing in PH from night to day. I have a PH probe on my tank and I am at 7.85 in the morning and 8.15 in the evening. Quote Link to comment Share on other sites More sharing options...
xcreonx Posted July 12, 2006 Share Posted July 12, 2006 It's kind of strange that both your KH and Ca are that high along with the ph.... what additives do you use for Ca/Kh? Quote Link to comment Share on other sites More sharing options...
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