View Full Version : Which chemical in the Nit. Cycle is the most toxic to fish?

10-08-2002, 10:34 AM
I would guess Nitrate, since it is chemically furthest from what is excreted by the fish.

So which is worse: ammonia, nitrite, or nitrate?

Or are they equally harmful?

10-08-2002, 10:39 AM
For all practical purposes, Ammonia and Nitrite are both equally, and highly toxic to fish. Nitrate is much less so, which is a good thing since it tends to accumulate more, being the end result of the Nitrification process. It's still not good for your fish, and should be kept at a minimum through water changes. Think of it this way;

Ammonia & Nitrite = Anthrax
Nitrate= Second hand cigarette smoke

10-08-2002, 10:44 AM
Ammonia & Nitrite = Anthrax
Nitrate= Second hand cigarette smoke[/quote:2532d28daf]

Nice analogy! Thanks.

Again, I was way off base.

10-08-2002, 08:30 PM
the only way to learn is to ask--so ask away. :D