Old tank- New tank

vmckague

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Hello new here and I guess new at fish keeping. I have had a 55 gallon tank for about 10 years and didn't really have much trouble with it. I kind of lost interest in it and let it go and most of the fist died over a three or four year period. Well I thought it was about time to get it up and running again so tore it down all the way and started from scratch. Cleaned out inside with vinager and put in new gravel. Use old filter but added new filter pads. Also used old drift wood. Let tank set for about a week to get clorine out and added four moleys to get the tank started. Waited about two more weeks and added 5 more molleys. Two more weeks and added 5 molleys and two tetras. The tank had been up and running for about 1 month when I had one fish die. Didn't think to much about it and went on. Then about a week ago my fist started dieing and within 3 days all are dead but 1 tetra and one molley. I kept a close eye on my water and the nitrates and nitrites never got high. Also checked the amonia and it was fine. After the firat fist died I added salt to the tank per directions on box. I had added some plants also about the time the fish started dieing. I thought maybe ik as the fish were rubbing on wood and swimming in the running water from the filter. I never did see any white spots on the fish. I set the water temp up to 80 degrees and have been using Quick cure for 6 days. But even after all of this last molley looks sick this morning. Any ideas what to do. I have lost 19 fish in a span of 5 days.
 
Hey and welcome to the forum,

Shame to hear things haven't started off to well. I think your problem is that your tank hasn't cycled properly. Leaving the water for 2 weeks without adding ammonia doesn't do anything I'm afraid.

Try reading through this post, I'm sure it will be helpful to you:
Avoiding and treating New Tank Syndrome.
 

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