12-22-2009, 07:00 AM
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I might be tempted to test water and see that parameters are in order= zero for ammonia and nitrites and nitrates no higher than 20ppm.
I have kept angelfish in moderate current with no ill effects, I doubt the "bubbler" is cause for concern. Sometimes dominant fish will display darker coloration, and sometimes subdominant fish ,will fade in color in the presence of dominant fish .Fish also display best colors for pre spawning and spawning activity. Fish also change coloration when stressed due to aggressive tankmates or too much activity by other tank mates. If all water parameters are in order, then I would look for other source of possible stress . Perhaps silver dollars are a little too active for this particular Angelfish or as mentioned earlier. If it is a relatively new fish it just needs to become more comfortable in new surroundings. If water is in order,and fish is eating ,no stringy white or clear poo.,, Then I would not be too concerned. Do check the fins of the fish to see that other fish are not shredding them.
Last edited by 1077; 12-22-2009 at 07:02 AM..