How long to Cycle new tank?

90gal with one 9" Comet.
Aquaclear 500 with sponge, 1 bag of BioMax, 1 bag of Eheim Lavarock, 1 bag
of Ammrid (Amrid added yesterday).
Added recommended dose of Biozyme week1, and added recommended dose of
"Cycle" week2
Tank has been running for 25 days, Ammonia keeps peaking, gotta keep
changing 30% water every 2 days
How long is this gonna take? I gotta go on vacation next week (for one
week), I don't want to impose on the guy
whose feeding the fish to do a water change. Now I'm worried.
PH 7.0
Ammonia, I try to keep it below 1.2mg/L but it keeps peaking.
Nitrite Seems to be going up, 0.5mg/L
Nitrate very low.

Is the Nitrite peak phase of the cycle more dangerous than the Ammonia peak
phase?
Did I screw up by adding two different bacterial enhancement products?

....S