Hi Peterek!
The Channa are doing great. I followed your advice ans took wild fishes.
I probable have a pair, they are very often together and they chase the others when they came in their area.
The third one is the Big "boy", first on good, eat everything... He is like a vaccum cleaner. He is the bigger one.
Number four makes his life, no trouble.
Number five is the smallest, chased by the others. I think he eats a lot less than the others so i decided to put him in an other tank for a moment in ordre to let him grow.
I will put him back with the others when he will bé bigger.
I have some issues with the tank... I have cyanobacteria at some spot.
I slowed the progress during several weeks and vaccumed it, but this last days it seems to spread on the plants now....
Other wise i am very happy with them, i Can touch them when i feed them, they are very funny and interesting.
I have a spare tank 120x50x50 and i may build a 160x60x70 (Riparium style). Both for Channas.
I have some pics i will add to the topic