barbel and guppies
Barbels of the genus Barbus, or Puntius, pluck the fins of long-finned fish such as guppies or bettas. Certainly do this:
Harlequin barbs and Sumatran barbs also pluck guppies by their fins.
threadfish and guppies
Dwarf gourami can be kept well with guppies. Dwarf gouramis eat at least part of the young guppies. Guppies are very dominant and gouramis are more timid. Sufficient plant hiding places should therefore be offered so that the gourami can withdraw. In aquariums that are too small, a male threadfish can hardly build his nest in peace if he is constantly being disturbed by many guppies.
Blue gourami and guppies also live in an aquarium without any problems.
bettas and guppies
Siamese fighting fish, Betta splendens, should not be socialized with guppies. Usually the male bettas attack the guppies. One of the stimuli to which Siamese fighting fish react aggressively is the more or less extravagant fin dress that other Betta splendens wear. Female bettas also attack male guppy fins. However, it has also happened that the guppies have eaten the fins off the betta.
puffer fish and guppies
Indian dwarf puffers that live in freshwater might get along with guppies. Because the puffer fish can become quite disgusting fin biters, real caution and good species-appropriate feeding are called for here.
With larger puffer fish, trouble is definitely inevitable. So-called green puffer fish become very aggressive. 3 to 4 species with different temperaments and requirements are traded under the name green puffer fish.
The green puffer Tetraodon nigroviridis, for example, eats shelled mussels, shelled snails, frozen gammarus, white bloodworms, young guppies, live houseflies and crane flies. They live in brackish water and grow to around 17 centimeters in the wild, staying a little smaller in the aquarium.
Puffer fish are not suitable for socializing with guppies. They like to nibble on long fins. Some puffers even nibble on the dorsal fins of armored catfish.
Red neons and guppies
In soft water, red tetras and guppies can be kept together. Although guppies, like other livebearers, generally prefer harder water, there are populations in the wild that live in softer water.
With a total hardness of up to 10°dGH, carbonate hardness of up to 6°dGH and a pH value of up to 7, red neon tetras can be kept together. Only after that you can no longer breed the red neon, as they can no longer produce viable spawn. When the water is so hard, kidney gravel, i.e. basically small kidney stones, quickly forms.
angelfish and guppies
The socialization of angelfish and guppies is not recommended. If guppies and angelfish are used to each other from an early age, socialization can go well. However, if relatively small fish are added to adult angelfish, such as guppies, the small fish are very often eaten.
Even if the guppies are not eaten whole, the guppies are often ruthlessly chased by the angelfish. For example, the fins can be completely eaten away.
Even with scalars that have been kept with guppies for years, the nature of the scalars can eventually come out so that the scalars eat the guppies after all.
Dwarf cichlids and guppies
The socialization of dwarf cichlids and guppies depends on the exact species of dwarf cichlids and the individual character of the animals.
Apistogramma agassizii, for example, prefer a completely different water quality than high-breed guppies.
Apistogramma cacatuoides eat guppies up to about 2 centimeters. Larger fish are not usually eaten by Apistogramma cacatuoides.
If dwarf cichlids are to be socialized with guppies, only larger guppies should be used. If the dwarf cichlids are already in the aquarium, new fish should only be added after the light has been switched off. Cichlids in particular attack the newcomers, who often swim around without orientation. In the dark, the stress for the new fish is often less.