I just recently finished a successful hypo. It took me two months all in all.
I would say that refractometers are much more accurate than hydrometers. I would say that if you can, calibrate your hydrometer to a good working refractometer. However, why use a fork to eat your soup when you have a spoon, right?
I would also advise that you bring down the specific gravity to about 1.010 (if hydrometer is used, just to be safe) in the course of 3-4 days. 2 days is a little too fast, especially that it's a QT
where water volume makes the parameters change faster.
When you're done, slowly bring back the sg
to 1.024. This is the one that takes forever. I would advise to raise the sg
by 0.02 - 0.03
every week for the next 5 - 6 weeks. Then drip acclimate your Flame back to your display for 4 - 5 hours.
My two cents