bodieman: Is your 29gal a bow (tall) tank? I see you have TWO tanks, so officially, in
MTS. Good for you!
Your nitrite readings indicate that the first part of the
nitrogen cycle is almost done (the sustained Ammonia Spike); within a day or two your readings of Ammonia will drop substantially within 24 hours, maybe drop to near zero in 12 hours, and nitrites will skyrocket (off-charts readings, with values >1.0ppm)
You'll do a thorough substrate cleaning by vacuuming all those solid waste ONCE your tank is fully cycled. That ugly scenario will likely help the cycle. Only if you have overfed the tank (e.g. Ammonia goes >6ppm) I would consider cleaning it, but only half of the substrate; in a couple of days you could clean the other half.
I have done fishless cycle to all my tanks while planted, and I only do a
water change when the cycle is over. Must admit that first substrate vacuuming is gross (and I only use ammonia solution, not fish food, but it gets dirty, besides fine sand particles)
Pepe
Santo Domingo