Quote:
Originally posted by Flint&Eric
and what is the effect on PH as oxygen levels are reduced/depleted?  the effect is minimal imo, but given proper depth they can offer some buffering capabilities.
...didnt notice all the cardinals before, those look great 
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Yeah I love those little cardinals... I really need to take a better photo of them, but they group up nicely, and are nice aggressive eaters.
They school nicely when my tang starts running around the tank chasing his reflection.