HELP! ASAP! Acidic Water. Cory dead!

[Mumma.of.two]

I had already cycled my tank so is it just cycling again for some reason? It cycled in December when I first got it.

Did you replace the filter or substrate? Rinse anything in tap water?

 

[pleechford]

That would work but IMO would be a real pain having to buy it all the time, especially during a fish in cycle. Ammonia in the tap water isn't the end of the world. The BB colony will grow to accommodate the tap water ammonia and the ammonia produced by the fish. The dechlorinator will temporarily convert the ammonia to a less toxic form. By the time it wears off the BB will have consumed it.

Very true