Max % water Change

[Chad]

The source was my change water. It seems for some reason that if it is mixed without being used for more than 2 days it starts to cycle.

I did a test a little while back when I realized my Nitrates went up instead of down when doing a water change. So, my Kent salt water mix that was made for more than 5 or 6 days prior to changing the water had a nitrate level of over 25!

Currently my tank sits at 25ppm.

I now mix and change the water the day I make it.

BTW I do have an RO/DI and the RO/DI water stays nitrate free for over 3 days (the longest I tested) .. It only starts to cycle once I added the salt??? weird.