04-12-2012, 06:37 AM
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Originally Posted by Geomancer
I'm afraid you were told wrong, Angelfish should always be purchased together to reduce the chance of what you're seeing, this is included in the profile here for Scalare Angelfish. Usually I believe it is the other way around though, the originals bullying the new arrivals.
That said, a 75L tank is only about 20g .... which is too small even for a single Angelfish. To keep four Angelfish, which is the minimum recommended number, you would need a 4 foot tank which is 55 gallons here in the US. That is roughly 208 liters.
They are likely stressed (new environment, plus too small) and stress is known to cause fish to be aggressive.
+ one ,these fish need much larger tank than 20 gallon.
Are small now ,but can and do grow to the size of a man's hand in a year or less.
I kept one black marbled Angelfish in 29 gallon tank for nearly two years but it was only cause he/she would not tolerate ANY tankmates.(cept snails).
5 to 7 of the Angelfish in 55 gal would work well, but if a male /female pair forms and attempt breeding,,then other's may need to be moved due to aggressive nature of nearly all cichlids at this time.