The new sand will have to be colonized by bacteria to make it functional, but as long as you are not adding any source of ammonia with it, adding a RDSB will not cause your ammonia, Nitrite, or Nitrate levels to rise.
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LARRY
"The significant problems we face cannot be solved
at the same level of thinking we were at when we
created them." Albert Einstein
I'm pretty sure it's Mike's fault.....
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