Water chemistry

Ammonia Spike - There are many reasons why an ammonia spike can occur in your aquarium. One of the most common is that the tank is new and has not been cycled (If you have a newly setup aquarium and arent sure about cycling, give our short book a try, FREE on kindle).  Whatever the reason for the ammonia spike, it needs to be dealt with quickly. Ammonia is highly toxic, so it won't be long until you find you have very ill or dead fish.