All fish produce Ammonia.
secondary succession
definetly not acidic
No only acidic
Simple answer is yes. Guppies mate and produce young under almost any reasonable conditions. The presence of other fish will not bother them at all provided the other fish are not predators and the guppies under pressure for survival.
fish
No, guppies are fish.
That would depend entirely on the type of fish, however species of animals are usually not classified as being alkaline OR acidic.
The tiger fish would eat the guppies.
Guppies are a type of fish. There are no types of guppies.
They could but it wouldn't be very suitable. Guppies, although small fish, produce millions of eggs, and being fresh water fish, they need to be layed in the river they inhabit. Only a handful of guppies will survive, so they need a rather big space to reproduce/
Fish that have long, wavy fins should not be put with guppies, because guppies will nibble their long fins. Also, many bigger fish will eat guppies. Keep a separate tank with guppies and a few "cleaner" fish, which do not harm guppies.
Only guppies breed with guppies naturally.