After 7 weeks Id imagine the die off is over.
Your test kit can still be faulty even if it's a good brand.
They require proper storage if they are to remain reliable.
They also have shelf life, maybe yours has past or maybe you just had
some real bad die off.
I'd concider this unlikely.
How much current is in the tank, the more the better in most situations.
The rocks ability to process nitrite and ammonia is directly related to
the amount of contact with the water so the more movement the more
contact and the faster the rock can process the waste.
You are certainly having a long cycle, ut unfortunately you just have to
wait it out.
Are you able to mix some fresh ASW with RODI water and test this to see
if your nitrite test is OK?
Simon

mrtorts wrote:

Thanks Simon. My nitrite test kit is Salifert, but I'll take a sample
to the fish store to be sure.
I tested this morning and the ntrite level had risen to closer to .02!


--
mrtorts

David
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