I don't know - when I moved them to the big tank they got so stressed out, they committed suicide one after the other

. They just curled up in a corner and died within a few hours of moving. I don't understand why - there's no ammonia, no nitrite, no nitrate, the ph is the same as the old tank - I used all the same rocks and gravel and also most of the old filter media and water. I used stresszyme in the water and it still didn't help them.

This was over a week ago and there's been no ammonia or nitrite spike. The others are slowly getting used to their new surroundings, but they're still not very happy. And I thought that I was doing them good by moving them to a large tank.

I thought of getting some dithers so that they can see there's no danger for them and a couple of synos - maybe the same as I had coz they're like vacuum cleaners - no waste at all with them around.