Added 6 Sterbai Corydoras and 5 Cardinal Tetras on Sat, then added more 5 Cardinal Tetras on Sun.
Corys are doing fine - exploring the whole tank, eating Hikia algae wafer and giving me a lot of joy
On the other hand Tetras are worrying me, since they stay in the corner and do not eat at all. I'm using New Life Spectrum Sinking Pellet, initially it floats at the surface for some time, then it is taken to the middle of the tank with the filter stream. Today is Tue so Tetras should be hungry but they are not interested in food.
Another trouble comes from the plants - they started to cover with black/brown spots. I can't remove the spots from the leaves so I guess it's not algae. NH3 and NO2 is 0, NO3 is around 5-10 ppm, pH is 7.0- 7.4, temp 79-80 F. I keep KH around 1-2 and GH around 5-6, this should be acceptable by both fish and plants. I guess there should be a reason for the spots on the leaves.
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20 gal tank - good mix of community fish ?
