Tank Ammo

i have ammonia in my tank,i cant get rid of it i have tryed water changes and ammo lock and i cant get rid?

i brought a second hand tank with 15-17 fish, there water was full of ammonia and nitrite so i used the water out of my 125ltr tank and added tap water 2 fill up the400ltr tank, i added my 12 fish put new gravel in used my external filter, and brought a new external filter to run with it, but i have had ammonia in it 4 11 days now,i have not lost any fish yet,but im starting 2 get worried,please help

Your tank is going through the cycling process. You are going to get ammonia readings until there is enough bacteria in the tank to cope with it.

Your task is to keep the levels below fatal, which means doing partial water changes to dilute. If you have a high ammonia reading then do a 30% change today and another in a couple of days. Make sure the fresh water is dechlorinated and the same temperature as the tank water.

You have quite a large number of fish in there which means a lot of ammonia output, so you will need to do more frequent changes than if you only had one or two. I suggest 10% every other day after the initial two big changes.

Once the tank has cycled you can do 25% once weekly

Using your old filter was a good idea, as long as it had been running and has the bacteria in the media.

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