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  #51  
Old 07/03/2004, 11:12 AM
RQ RQ is offline
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OK.
Thank you again Randy. I´m going to buy new tests and going to repeat de experience.
i will keep you informed in a new thread.
  #52  
Old 07/03/2004, 08:35 PM
Randy Holmes-Farley Randy Holmes-Farley is offline
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You're welcome.
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  #53  
Old 07/06/2004, 01:44 PM
Pmesyngier Pmesyngier is offline
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Hi Randy , I know the RQ`aquarium and I think that problems are :
A)the sand bed is liberating H2S to aquarium water
b) RQ do not make water changes since a few years
c) The big algal grown (Caulerpa and Halimeda) is dropping ALk and Ca levels
d) RQ is ONLY adding kalk and MgCl2 . 6H2O to a 2000Liter reef tank (500gal aprox)
E) The reef have a great coral and coraline algal grown since 3-4 years
F) RQ use so little actived carbon and remove it once a month
For all these I think that aquarium water is "saturated" or deficient in cations and /or anions
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  #54  
Old 07/06/2004, 08:52 PM
Randy Holmes-Farley Randy Holmes-Farley is offline
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For all these I think that aquarium water is "saturated" or deficient in cations and /or anions

I'm not sure what that means. Deficient in what?

the sand bed is liberating H2S to aquarium water


Why do you think that, and what do you think it is doing once released?
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  #55  
Old 07/07/2004, 06:45 PM
Pmesyngier Pmesyngier is offline
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I'm not sure what that means. Deficient in what?

Deficient in carbonates and bicarbonates (and other anions or cations wich could interact with KH and Ca++) and "saturated " in cloride and organics compounds

Why do you think that, and what do you think it is doing once released?


I think that the problems in the sand bed ( too much organic matter in anaerobics conditions) could be creating H2S , and this could be neutralizing basics, downing pH and KH.
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  #56  
Old 07/08/2004, 08:35 AM
Randy Holmes-Farley Randy Holmes-Farley is offline
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There is almost no chance, IMO, theat there is enough H2S released to impact alkalinity or pH. It is very toxic and small amounts could be a problem in other ways, but not enough to impact these much higher level chemicals.

Seawater is never saturated in chloride, and not likely in organics either, although the levels in an aquarium could be much higher than usual for seawater. c

Carbonate and bicarbonate are directly measured by alkalinity (dKH). So if those levels are normal, then the water is not deficient in carbonate or bicarbonate.
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  #57  
Old 07/13/2004, 06:47 PM
Pmesyngier Pmesyngier is offline
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so , you think that there aren`t relation bettwen the sand bed and the " ph -kh -Ca dropping"?
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"MORE BIOLOGY LESS TECHNOLOGY"

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  #58  
Old 07/13/2004, 07:15 PM
Randy Holmes-Farley Randy Holmes-Farley is offline
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No, I don't.
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  #59  
Old 07/14/2004, 07:23 AM
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Hey guys, I recently sold off 90% of my SPS and clams in my nano. I had a 24 hour alk drop of 3 dkh. Now my 24 hour alk drop is closer to 1 dkh. The tank was pretty packed with stoneys. Now I have a couple colonies and a few frags. I thought for a long time that something was severly wrong with my tank, but I'm thinking now that it actually was all the stoney corals using it up.

For what that's worth...
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  #60  
Old 07/14/2004, 07:26 AM
Randy Holmes-Farley Randy Holmes-Farley is offline
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but I'm thinking now that it actually was all the stoney corals using it up.




The smaller a tank is, the more likely that is to be a problem too, since smaller tanks have more corals per unit of water volume, typically.
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  #61  
Old 07/16/2004, 04:56 PM
Pmesyngier Pmesyngier is offline
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Thanks RAndy!
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"MORE BIOLOGY LESS TECHNOLOGY"

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  #62  
Old 07/16/2004, 05:39 PM
Randy Holmes-Farley Randy Holmes-Farley is offline
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You're welcome.
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