[Coral-List] NH4 Levels in Aquaria

[Stephen Lowes]

 Angus:

I'm not sure where you are getting your published NH4 levels for coral
propagation. 20ppm NH4 would be very detrimental to any aquaria, fish or
invertebrate culture. I run a small coral farm and strive for undetectable
ammonia (ammonium), and nitrite levels. There is reasonable rationale for
maintaining 1-5 ppm nitrate levels for efficient coral growth but there is
little work published species by species.

Steve Lowes, Ph.D. 

Angus, others.

Sorry about the following but I am not familar with the aquarium worlds.

Could you provide some of the "lot" references for ammonia NH4 being 20ppm
for coral propagation as these levels far exceed the levels accepted for
discharge of treated sewage effluent to marine waters.  

Are these levels acceptable for aquaria only ?? - I believe they would
stimulate alot of alga in the tank or real water. 

Dr. Tom Williams

--- Angus Macdonald <angus at ori.org.za> wrote:

> Hi,
> 
>  
> 
> A lot has been published about optimal NH4 concentration in aquaria in 
> which coral is propagated. 20 ppm seems to be about right.
> Is this in the right
> ballpark and does it become toxic to hard or soft corals at higher 
> concentrations?
> 
>  
> 
> Thanks
> 
>  
> 
>  
> 
> Angus Macdonald
> 
>  
> 
> Oceanographic Research Institute
> 
> uShaka Marine World
> 
> Point Road
> 
> Durban
> 
> (031) 328 8168
> 
>  
> 
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