> I'd be very careful, I dimly remember someone killing all their aquarium
> fish (fresh water) by experimenting with CS in the water; it was on this
> list several years ago.  As Frank points out, the silver chloride may be
> much less toxic, it's much less effective.  I'd also wonder if it would
> kill algae.

That was me...

I'll have to check out the link that was posted. If people are now 
deliberately using silver preparations in aquariums, I'd like to see 
what they're saying about it.

A properly balanced (freshwater) aquarium has a well established 
"biological filter" consisting of several classes of bacteria that 
progressively break down fish waste products into sequentially less 
toxic chemical forms.

If you combine that with regular partial water changes to control the 
ultimate concentration of the final breakdown products, the healthy 
aquarium can be very attractive and low maintenance.

At least part of the chemical sequence is something like this:

Ammonia >>>>>>> Nitrates >>>>>>>> Nitrites

Extremely Toxic > Moderately toxic > Mildly toxic

(I might have the nitrates and nitrites reversed. It's been a few 
years! <shrug>)

A different type of bacterium is responsible for each step, and a 
similar sequence processes fecal matter. They all balance each other 
out and self-adjust as needed, creating a surprisingly resilient 
system. They grow in the gravel and any filter medium.

If you take a setup like that and throw antibiotics or CS in it, in 
sufficient quantities to kill or damage the biological filter, you'll 
have almost instant problems with build up of waste products plus the 
dumping of all the metabolites of the now dead bacteria. 

Only aggressive and disruptive major water changes would allow you to 
stay ahead of the toxic buildup and allow you to eventually re-
establish a healthy eco-system.

If you want to treat diseased fish, it would be better to carefully 
establish a separate and well controlled treatment tank and transfer 
them to it, rather than treat the whole tank. Such a setup would 
require careful monitoring of waste products and water chemistry, given 
that it would not have anything to stabilize the conditions.

Now, this is only one style of aquarium management. I'm sure there are 
others. I only know about this with respect to freshwater; I have no 
experience with salt-water aquaria.

Just read up and know what you're doing before you start to experiment, 
if you care about your fish.

Be well!

Mike D.

[Mike Devour, Citizen, Patriot, Libertarian]
[[email protected]                        ]
[Speaking only for myself...               ]


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