thereverendturtle
I'm to old for this
You're welcome! And welcome to the site.
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It totally depends how fast your nitrates rise as its those that we reduce with water changes. So test it after a week and see what you got.
Me, i change 50% every weekend.
thats the problem when you pick single fish out thinking "oooh thats nice!" and only buy one of them, not realising they are schooling fish that like the company of their own kind. When you keep fish like this, they develop odd tendancies, which range from agression to depression. maybe now your water is better, its time to look at your stocking?
3 Tiger barbs in a tank that size is just pitiful too.
thats the problem when you pick single fish out thinking "oooh thats nice!" and only buy one of them, not realising they are schooling fish that like the company of their own kind. When you keep fish like this, they develop odd tendancies, which range from agression to depression. maybe now your water is better, its time to look at your stocking?
3 Tiger barbs in a tank that size is just pitiful too.
^^ Agreed. If your water is better, it's time to up the numbers of your schools.
Personally I would go with 8-10 Tigers and 8-10 Rosy's. Certainly helps spread the agression.
If you're really worried about your Rosy barb being nasty, take him back and replace him when you buy more. You may just have a real nasty fish. Every fish is different.
That's what I would consider anyway. Someone may correct me
Jumping on this thread rather late, but Rosy Barbs are unsiutable tankmates for everything else, they are sub-tropical and should be kept at 18-20C for most of the year with a peak of no more than 22C. Keeping them at the high end of this range or even higher will put them in a permanent state of hyperactivity and shorten their lives considerably, this could explain why yours are being aggressive. They belong in a temperate tank with fish such as Peppered Corydoras; Redline Torpedo Barbs; Zebra Danios; WCMM etc.
http/www.seriouslyfish.com/profile.php?genus=Puntius&species=conchonius&id=181
By rehoming the whole group, you could then increase the Tiger Barb numbers.