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I have 2 F and 3 M rabauti in a 35 liter tank.There are many oak leaves bottom.pH is 6.8 and I guess GH around 10.It is 24 C degree.I give them live food as white worms,tubifex and I give them JBL novotabs in routine.

I did many times water change but there arent any change.Where am I doing wrong?They even dont tend to take T-position.

I had success with softer water than that. Also a bit warmer too.
One thing they seem to need is quite a bit of water movement; they lay their eggs in the fast current near the surface.

Thanks for reply.Is it suitable 26 C degree?Or much warm?