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04/21/2012, 07:49 PM | #1 |
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Join Date: May 2009
Location: Benicia CA
Posts: 195
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Switching ALK parameters due to salts being used
Can anyone confirm wether or not they saw certain corals or coral or whole tank get affected based on slowly going to a higher or lower ALK? I say this cause pending on the salt you use they ALK can range from 8-12. I'm not talking about swings of alk and causing RTN but rather slowly coverting from a 8 to a 11 or opposite? I just went to a diffrent salt and went to a higher ALK and some SPS look crappy while others stayed the same. Thanks
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04/21/2012, 09:28 PM | #2 |
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Join Date: Dec 2010
Location: Toronto
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I think it mostly has to do with rapid changes in KH.
I've seen tanks with pretty low KH with great corals and I think it's because it's stable and it went down very gradually. I'm raising mine a bit, but doing it very slowly, as stability if the key for corals. |
04/21/2012, 09:59 PM | #3 |
Moved On
Join Date: Apr 2012
Posts: 112
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agree stability is key...i run at 7 dkh cause i use pellets
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04/21/2012, 10:20 PM | #4 |
Dr. Reef at ur service
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mix 1/2 and 1/2 of ur old salt and new to get a middle ground on alk. then slowly increase mor of ur new salt in the mix.
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Water Quality: NO3 0,Phos 0,Cal 440,Alk 7.5,Mag 1300 "Reef Fast, You Crash, Reef Slow, You Pass" Mike's Reef 3:16 Current Tank Info: 350g DT,95g sump, 50g Frag tank, 4800gph return 4x Sea swirls. 6x AI Vega Color. 200# Pukani rock, dual recirculating skimmer, Biopellet, GFO Carbon rx's, Cal rx. Closed loop. 1.5hp chiller, genesis renew. Apex & RKE |
04/21/2012, 11:40 PM | #5 | |
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Quote:
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04/22/2012, 09:58 AM | #6 |
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Join Date: Apr 2001
Location: Arlington, Massachusetts
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The alkalinity in a salt mix has almost no bearing whatsoever on the alkalinity in an established reef tank using that mix. With a day or two the alk will be determine by the amount you dose, not the starting values. Water changes generally have only a tiny impact on alkalinity.
For example, if the tank has alk at 8 dKH and the new salt water has alk at 11 dKH, a 10% change only brings the alk to 8.3 dKH. So that boosts alk by 0.3 dKH. Most people add 1-3 dKH per day in typical reef tanks, so that 0.3 dKH boost once in a while is not that significant.
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Randy Holmes-Farley Current Tank Info: 120 mixed reef |
05/07/2012, 06:11 AM | #7 |
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Thanks Randy for the clarification.
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Haksar |
05/07/2012, 12:42 PM | #8 |
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Location: Arlington, Massachusetts
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Happy Reefing.
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Randy Holmes-Farley Current Tank Info: 120 mixed reef |
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