What is an cheap and easy way to lower Ammonia and nitrite?

  • We are currently upgrading MFK. thanks! -neo
Perhaps you're overfeeding them?

Usually you should just feed them what they'll consume in a few minutes time, then clear out the rest if there is any.

I'm assuming if you are still getting ammonia/nitrite, that your tank is new and in the cycling process?
 
How long has it been running now?
 
If it's a new setup, it's not finished cycling yet. Keep testing and doing waterchanges until they both are at zero. You should not keep many (or any) fish in a tank that's not cycled unless you have lots of live plants.
 
Achara catfish give off alot of waste too
 
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