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Hello, I have in 160 liter (42 gallons), 16 Pangion kuhli and 5 Pseudogastromyzon. I will have shortly 4 Mystus bimaculatus. Tank is plant with microsorum, vallisneria, cryptocoryne and echinodorus, with shingles. Cohabitation is possible ? Mystus eat Pseudogastromyzon ? (450mm or 0,17 p)

While I don´t know much about the Mystus, I would not combine Pseudogastromyzon (from extremely rapid waters) with Pangio, from shallow, almost stagnant waters.

Apart from current, end thus oxygen content also the optimal temerature is different, as P comes from higher up in the mountains

I filter 5 times the volume of the aquarium and will increase to 10 times. Pangio do not seem to be hampered by the current which is locally blocked by the pebbles.