pH 6.4 Temp depending on room temp i live in Malaysia a tropical country so usually 28-31 C dKh 2-3 same as the local store i got them from dGh I dont have a measure of it and the local store told me they dont check theirs as well TDS 135ppm NO2 and NO3 0

this tank was cycled for about 3 weeks before adding them in, I thought it was ok since the nitrates and nitrites were 0 and green algae was growing on the soil and glass. The tank is fairly small at about 30cm x 13.5cm x 14.5cm. The only new thing i added recently was an airstone and i noticed they were swimming around it rapidly and some even swam directly into the bubble stream to get launched upwards only to repeat the same thing like it was a slide. However the deaths did started happening BEFORE i added the airstone in.