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Old 07-22-2013, 05:17 AM   #41
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Could also be what salt is being used. I have a buddy who couldn't get the dkh he needed with reef crystals, changed to dnd salt and it instantly went to where he needed it.
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Old 07-22-2013, 10:49 AM   #42
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+1 Same problem I had before. Now I am using Coralife.
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Old 07-22-2013, 04:13 PM   #43
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Alright, I will not dose anything from now on and just have to do big water change to see if that will correct the problem. I'm going to start collecting my water now and maybe do 50% water change on Wednesday.

How many water change should I do before I should be consideing dosing?
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Old 07-22-2013, 04:56 PM   #44
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The 50% would do it in 1 shot. I would not dose as much as possible.
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Old 07-29-2013, 04:39 PM   #45
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Ok I did a 50% water change last Friday and im about to test my water today. What is the best time to check my water if im concerned about the alkalinity?
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Old 07-29-2013, 07:19 PM   #46
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Best to take readings is before lights are out since you need PH reading as well.
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Old 07-29-2013, 07:50 PM   #47
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Immediately after lights off, that's when your PH will be highest. Morning before lights on should be lowest. Kh doesn't seem to vary the same way, so when it's convenient should be okay.
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Old 07-29-2013, 08:37 PM   #48
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Alright so here is my water now. At 1.025 SG i have my pH at 8.1, kH=5.9, calc=420, mag=1280 (this is an hour after the lights turned off)

My freshly mixed water in the bin before i added it to the tank was

At 1.025 SG i had my
PH 8.2
KH 8.7
Calc 460
Mag1320

What should I do now? Been like weeks that my KH keep changing from 8 dkh and to as low as 4.3dkh

Edited
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Old 07-29-2013, 09:47 PM   #49
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When did you switch to Kent and how many times have you done pwc? Your calcium reactor might be affecting it.
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Old 07-29-2013, 09:52 PM   #50
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I dose alk and cal daily 40ml of both. Alk 9.8-9.1 cal 400 sometimes I dose more cal to raise it. If you are lps or softie heavy your alk will lower quicker. I would dose two part like you been and when you test keep a log of how much you add and how the reading go up. Test daily until you figure out how much is needed to maintain proper levels then test bi weekly. I use kent salt alk is 9.1 and I have to dose. Things grow!!!!!
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