u/Far-Fall8160

Can I put starter in the fridge if it’s active but not fully active?

What are the “rules”

Hello! I started following this YouTube recipe for my starter. Said it would be ready around 21-22 days. I’m stuck in the last phase and my starter had been doing so well. Help!

Here’s what I did!

Day 1: 50 g wheat flour-50 g water
Day 2: no discard. fed 50g wheat flour & 50g water
Day 3: started w discard. 50g starter: 50g wheat flour: 50g water
Day 4 false rise: but fed the same as above
Day 5: started to taper the whole wheat flour. 50g starter 25g whole wheat flour 25 g unbleached all purpose flour & 50g water
Did this for 2 days
Day 7-16: continue w taper. 50g starter 10g whole wheat & 40 g unbleached all purpose flour. My starter doubled consistently during this time.
Day 17- is supposed to be the strengthening phase
I did 10g starter: 50g unbleached all purpose flour & 50 g water. I’m on day 21 and nothing has changed :/ I have bubbles and no rise just a slight puff at the top. What do I do?? Continue what im doing? Change something?