05-06-2012, 12:33 PM
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The neon tetra will not do well with in the warmer temperature than the blue ram requires (82F), so this is not a good mix. Cardinal tetra would be OK temperature wise, and the rummys will be fine too. If you get the blue rams.
And most cory species do not last at high temperatures, Corydoras sterbai is one that does, but below 77-78F for the rest.
You could also stay with neons and corys and drop the rams, or go with the Bolivian Ram (a bonded pair or a single fish) which is fine at the cooler (around 75-77F) temperature the neons prefer.
The hatchetfish (and these must have a larger group, no less than 12 if Carnegiella species or 8-9 if the larger Silver Hatchetfish as you have space) will be at or above their max temperature with the blue rams, so here again a better fit with mid-70's temperatures.
All this is for the 55g, and I would add one or two more shoaling fish species once you decide on the above issues. These will be easier to find if the temperature is lower.
Another comment, live plants will greatly benefit any of these fish. Without plants, you will need to find a lot of decor to provide the shelter they all need to be free of stress. Plants is the easy way to achieve this, but a tank thick with branches reaching to the surface will work too, and floating plants for shade (essential).
Last edited by Byron; 05-06-2012 at 12:36 PM..