question

[daniella3d]

Have you checked for ammonia? If you have chloramine in your tap water and you used a dechlorinator, then that released the ammonia and left it behind. In that case you should use Prime. I would use Prime as your water conditionner as it is a very good conditionner that neutralize ammonia as well.

I would get a RO unit as soon as possible and do a good water change. Put some carbon in there maybe just in case there would be some chimical in it, or chemipure or polyfilter in case that would be some heavy metal.

Just don't use Kent carbon as it might be contaminated with copper. Seachem Matrix carbon is good, just rinse it very well and if you can, first soak it in boiling water for a few hours before use.

For 20 gallons tank, it is really best to have a RO unit since it will be so fast to generate enough water and it will last a long time without replacing the membrane. Since this condition coincide with the water change, I suspect some contaminant in your tap water. The conditionner only neutralize chlorine.

Originally Posted by kwok

Tank is about two months old and after an overnight of getting more oxygen in the tank the fishies are still breathing heavily. I also use nutrafin aqua plus for my water conditioner. It might be the spring water that has melted recently. Anything else i can check for?