Did you actually cycle the filter? I can't find mention of that above..
For the moment, your best bet is to do water changes to keep ammonia and nitrite well below 0.25 ppm. If your filter is actually cycled and just had a mini-crash because of the chlorinated water, then in a few days your problems should be solved. On the other hand, if it crashed completely or was never cycled, it will take weeks for the problems to resolve.
Can you get any media (sponges, ceramic noodles, whatever) from a set-up which is completely cycled?
For the moment, your best bet is to do water changes to keep ammonia and nitrite well below 0.25 ppm. If your filter is actually cycled and just had a mini-crash because of the chlorinated water, then in a few days your problems should be solved. On the other hand, if it crashed completely or was never cycled, it will take weeks for the problems to resolve.
Can you get any media (sponges, ceramic noodles, whatever) from a set-up which is completely cycled?