Loosing Galaxys

[TropTom]

Im having trouble with my galaxy rasboras..................

one by one they get dropsy or/and holes in their sides and die.

I have treated with anti bacterial.

They were in a planted tank so the ph, gh, kh was higher than what they should have. So now they have been moved to another tank whith a ph of 6.5 - 7, gh of 60 and kh of 40.

The water is changed 30%weekly and the tank is always clean etc.

Any ideas why they keep getting this problem?

 

[Harlequins]

Whats your readings for ammonia and nitrite?

Dropsy can be caused by poor water quality

 

[TropTom]

There is no ammonia or nitrite in the water. I cant understand what the problem is

 

[Harlequins]

How long has the tank been set up and what fish do you have?

 

[TropTom]

The tank has been set up about 6 months, and i only have galaxy rasboras. The NO2 has been zero since the first 6 week initial start up period, the ph, gh, kh has remained constant apart from when i slowly reduced to be more suitable for the fish.

Cheers