The relationship between your pond chemicals and pond animals can be both a positive one and negative one. For example, the negative chemicals that can be found in your pond can often be removed by positive chemical filtration. Basically, you will be using one chemical to attempt to rid your pond of another chemical. 
The tricky part is that you do have to make sure that you are using the correct chemical to treat the correct problem and that your animals are safe during the process.
By using certain helpful chemicals to treat harmful chemicals you are ensuring that your pond animals are safe, happy and healthy. Pond chemicals are used to treat things such as chlorine, heavy metals, ammonia and pesticides that may enter your pond through some drainage after a hard rain. The thing about your pond chemicals and pond animals is that they intertwine.
Pond chemicals and pond animals go hand in hand because you often can’t have one without the other. Pond animals will often release harmful chemicals or toxins that will in turn require the pond to be thoroughly purified through a type of chemical filtration.
The only thing you really have to worry about when it comes to pond chemicals and pond animals is whether or not the animals that inhabit your pond are being harmed. If you have a great filtration system intact then you need not worry too much. If you are taking good care of your pond by using mechanical, biological or chemical filtration then your pond animals should be comfy and cozy.
While maintaining a pond, your pond chemicals and pond animals will eventually have to meet. There is simply no way around it if you are truly shooting for a 100% healthy pond. 
Some of the pond chemicals you will run across are ones that treat water quality, algae growth, weeds, ammonia, sludge, and much more.
First, you must identify the problem with your pond. Do you have weeds or an algae problem? Are your fish sick or do you have poor water quality? These questions absolutely have to be answered before you perform a chemical filtration process. The process of choosing the right chemical treatment for the correct problem can get confusing so it never hurts to consult a professional if you are in this type of situation. You want to be absolutely sure that you have a good understanding of how your pond chemicals and pond animals will directly affect each one another.
