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Depends on the Temperature and Parameters of your tank.
I'm still leaning towards the green neons after what you've just said. As for what parameters, my ph sits at around 6.8 and my temp is usually 24.5 degrees Celsius.I prefer Paracheirodon simulans (green neon) because the neon line extends from the eye to the caudal peduncle and is thus the longest and straightest of the four "neon" species. This gives this fish a more slender, straight appearance. The lower red area is less brilliant, sometimes very much so. P. axelrodi (cardinal) is the brightest in red of the four known species (yes, there is a fourth discovered but not yet described/collected) and makes the most striking appearance in for example a blackwater tank. These two species share identical habitat and water parameter requirements; there are reports that they are sympatric in some areas of their range. P. simulans requires soft to very soft acidic water to be at its healthiest. P. simulans prefers the middle level in the aquarium, whereas P. axelrodi tends to remain in the lower half. These two species are genetically closer to each other than either is to P. innesi (neon tetra). The latter occurs in cooler water than the former species, which might be of importance in a community tank depending upon the other species. The "diamond head" is a selectively-bred variety of P. innesi, I always avoid such fish
24 or 25 is too cool for Cardinals, so go with the Green NeonsI'm still leaning towards the green neons after what you've just said. As for what parameters, my ph sits at around 6.8 and my temp is usually 24.5 degrees Celsius.
I can't really increase it because I have Juli Corys in the tank too. Green neons it is then.24 or 25 is too cool for Cardinals, so go with the Green Neons
Well my tank is 125 litres and contains 6 Juli Corys and 3 Honey Gouramis. I was thinking of a a school of 15?Hi,
Diamond tetra = P. innesi
Green neon = P. simulans
Cardinal tetra = P. axelrodi
They're close.
They're gregarious fishes.
They're sensible to NTD.
They want acidic soft water, blackwater is a plus.
As P. simulans is the smallest of them, you could get a larger school providing a more beautiful school effect, making it my favourite
I'd say 20 P. simulans or 15 of one of the other two.Well my tank is 125 litres and contains 6 Juli Corys and 3 Honey Gouramis. I was thinking of a a school of 15?