How does a rainbow fish stay safe?

How do you clean a pool that has flock added and a low PH balance? Do Albino catfish get along well with guppies and other library fish? Does the perch have a heteroceral tail? 'Why aren't oceans and lakes overcrowded with fish if female fish lay thousands of eggs? What eats bass? What should you name your black and blue fighting fish? How can you tell if a pregnant guppy is ready to have fry? Is there a pronoun for aquarium? Are the teeth on the sawfish ment to scare people away? Does heat kills salmonella? What is a blue tetra? Will triops still grow in rainwater? What is a sentence for the word piscatorial? What are some issues for marine life? How big is a coelacanth? What is the correct plural form of Fisher? Like ripples from a stone thrown into a pond? What is lateral management? What species are related to fantail goldfish? Can I wash and reuse the filters?