hey, below is a post by clive in another thread that will explain things a little...
quote -
Well get ready for more surprises:
Ammonia is toxic to bacteria, even the bacteria that eat ammonia. Adding ammonia to your tank is like feeding a baby a drink of water from a fire hose. It's just too much. Adding ammonia kills more bacteria that it propogates. It especially is toxic to the bacteria that DO NOT eat ammonia. The problem is that there are many more of
those that are just as important to the health of your tank as the ammonia eaters which are wiped out when you add too much ammonia to the tank. So just because there is a perceived increase in Nitrosomonas, it does not mean that you are doing the tank any good.
Just as a reality check, can you see this product?
Well it has ammonia and we use it to kill bacteria on the floors and kitchen surfaces. It's pretty effective. That's probably why you have it under your sink, remember? So don't be quick to jump on the ammonia bandwagon. It's a toxin and it doesn't help any more than simply adding nothing at all.
Secondly, Nitrosomonas/Nitrobacter are in a class of organism s called "che·mo·au·to·trophs" which means that they are able to make their own food from different inorganic substances, like CO2, for example. Because there are varied substances that they can use, they are NOT dependent on only ammonia. They simply switch to a new source of nutrition when the primary nutrient is in short supply,
Thirdly, there is always ammonia being produced in the tank. Any body of water will automatically develop bacterial colonies, even if there is nothing in it at the beginning. Residue, spores and precipitates from the air settle into the water and there develops a culture in the body of water whether we want to or not. Why do you think stagnant pools of water have an odor? The odor is produced by bacteria.
Even better is if you plant your tank at startup with lots of plants. All the bits and pieces that fall of and decay results in small amounts of ammonia which build in concentration naturally and at a proper pace. If you didn't have any plants you could just toss in some flake food and let it go at that. whatever animals or vegetable matter dies in the water immediately produces ammonia, so in reality Nitrosomonas never runs out of ammonia. In 6-8 weeks the tank can be considered mature and stable.
Fourthly, ammonia in the tank has to be converted to NO2/NO3 which, if there is a population of Nitrosomonas, will crash the Oxygen availability in the water. The bacteria require more Oxygen than ammonia, that's for sure. So sudden population rises ssuffocate the tank, which then kills bacteria because these guys are aerobic. When the tank goes into Oxygen debt those species we are trying to propagate fail at the expense of toxic anaerobic species, further deteriorating the health of the tank. People can't see that because they are measuring useless information like NO3 and they do not generally have tools to measure the things that really matter, like Oxygen or bacteria population demographics.
So nobody needs to dump ammonia into their tank, which is actually counter productive. People all over The Matrix turn their tanks into toxic waste dump sites and they think they are doing the right thing. Later they have plant or fish problems that developed from these procedures but they do not trace the problems back to this practice of pollution.
Change you water frequently to help control Oxygen levels, feed you plants with nutrition and ample CO2, keep the tank clean BE PATIENT and in a short will the tank will develop the necessary populations and diversity required to keep the tank healthy.
Cheers,