Mark said, "If you moved the LR always submersed in water then the rock
could not be the cause of increased Nitrogen compounds."
I dissagree, something could have died from different parameters in the new system, thus turning into excess nutrient.
As far as frags creating nitrate, unless they were:
a. dying
b. relasing a LOT of waste
c. sliming from something like being exposed to air
then I don't think they would be the cause. Are any of those things happening? But you would be able to notice any of these things happening.
From your response to my questions, everything looks okay. IMO, I feel that gravel vacing is very beneficial but I am a minority on this. But, try moving a tank that has never been gravel vaced before.
You said that you nitrates have gone up, but unless I missed it, what is the level at? IMO, I also feel that water changes are very beneficial but I doubt 50% of the members here do water changes frequently. Maybe your tank just NEEDS water changes more than other tanks do.