If your aquarium ecosystem is seriously damaged and your fish are unable to remain there safely whilst you repair it, set up an emergency tank and fill it with new, treated water. Adjust the pH with a buffer solution and make sure the temperature is close to that of your original tank. If...
Various fish species have been crossbred over the years either as pure research or as a matter of routine for aquaculture purposes. In order for cross-breeding to succeed, parent fish have to be somewhat closely related.
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