In all of my experience with fishkeeping, one of the most important rules that I've learned can be summed up above.


Fishkeeping is not a fast-paced hobby that can be rushed - it requires patience to allow your aquatic pets to flourish.


Quick and/or large changes to any aspect of a fish's environment can be extremely harmful - sudden changes can even kill your fish. Moreover, a fish may be better off living in conditions that are constant, but slightly outside of their ideal range (such as pH), than to experience rapid changes in these conditions, even if your intent is to make them perfect (as can be the case when attempting to adjust pH).


Things That DO NOT/CAN NOT Happen Quickly:

  • Completion of the THE NITROGEN CYCLE
  • ACCLIMATING your fish
  • Changing the temperature of your fish tank
    • Either warming up OR cooling down!
  • Water changes - changing water parameters such as:
    • pH

Things that DO Happen Quickly:

  • Onset of disease
  • Ammonia spikes
  • Failure of aquarium equipment

ONE Exception to the Rule:


Toxins can not be removed quickly enough from an aquarium! While making sure not to alter other aquarium conditions, as set out above, quick removal of toxins, like ammonia, is beneficial to your fish.


In an absolute emergency, such as spilling soap into your aquarium, you may need to jeopardize your fish by performing an immediate 100% water change in order to save them

  • Toxic chemicals such as soap can be lethal to fish within minutes
  • While such a large water change may drastically shift water parameters, your fish are more likely to survive this than exposure to the toxin.