What Have I Done?

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I have several large fresh water tanks with mixed communities in them. they were running perfectly for over a year. about 3 months ago i over did the salt by accident which in turn killed off my filter colonies.

I replaced all my filter media and did a 50% water change in each tank. I lost only 2 fish out of about 500. I treated the tanks like a new set up again. the ammo levels were very high so i used ammo lock. still no fish loss. i stopped using ammo lock about 6 weeks ago even tho i was still getting high ammo readings but the fish were fine. they still are yet the readings are still over 10ppm. the tanks do not have that earthy smell that they should have. all my white filter material has gone a pinky/ purple colour.

this is baffling me. the ph is 6.5, nitrite 0, ammo 10 yet the filters dont SEEM to be working correctly?sad2.gifsad2.gif? what is going on?

please someone.....give me an idea as to what might be going on.

thanks

nick

 

[WILDER]

Stop using the ammo lock.
What your tap nitrate reading and tank.

Has the salt damage the impellors
I would post this in chat will get more help.