Will my Angelfish kill the others?

Here are some screenshots of all the freshwater tropical fish listed on the store I bought the fish from’s website. Which of these are most suitable?

Which country do you live in?

They have some interesting fish on those images but most of them are not suitable.

Desert Gobies for example are Australian and I don't normally see them for sale in Australia, so I can't image them being common overseas.

One of their pictures says Goyder River Rainbow. The fish in the picture looks like Melanotaenia maccullochi, not M. trifasciata (Goyder river). But M. maccullochi would be ok in the tank.

Apistogramma cacatuoides or Kribensis would probably be ok. They hang out down the bottom and usually breed easily.

Congo tetras, Julii cories, red phantom tetras & honey dwarf gouramis would all be ok. Virtually everything else on those images you want to avoid because they are either fin nippers or require hard alkaline water.

Yeah I live in Australia

I believe im going to rehome the mollies and buy some tetras. Im deciding between the red phantom tetras or the congo tetras. Should I buy some of each or just one of the types, and how many should I buy in total? Keeping in mind my tank is 165 litres with 2 angelfish that could potentially be territorial?

This tank is not sufficient size for Congo Tetra; this species needs a 4-foot (120 cm) tank and a group of 9-12.

Red Phantom Tetra, Hyphessobrycon sweglesi, is a better choice though the angelfish gender is the unknown factor. If you have other tanks to move whichever should that become necessary, OK. A group of 8-12 with this species is preferable. Be certain they are H. sweglesi, as several species in this "clade" can be quite similar and among these there are some real terrors that could fin nip the angelfish literally to death.

Byron said:

This tank is not sufficient size for Congo Tetra; this species needs a 4-foot (120 cm) tank and a group of 9-12.

Red Phantom Tetra, Hyphessobrycon sweglesi, is a better choice though the angelfish gender is the unknown factor. If you have other tanks to move whichever should that become necessary, OK. A group of 8-12 with this species is preferable. Be certain they are H. sweglesi, as several species in this "clade" can be quite similar and among these there are some real terrors that could fin nip the angelfish literally to death.

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Do you believe the angelfish will become aggressive in this size tank?

matthayden said:

Do you believe the angelfish will become aggressive in this size tank?

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That is not easy to clearly answer, as I tried to explain back a few posts. It depends upon the gender, and the temperament of the individual fish. But to be as honest as I can, yes. If one of them is male, the whole tank becomes his domain, that is in his DNA. If both are male, one will likely be dead before long. Two females, not certain what might occur. A pair, same, unless they bond, and then as they spawn the other fish could be the losers.

Remember angelfish attain six inches body length, with a vertical fin span of 8 inches.