Stuck Tripel?

Hey all, so i made the Allagash Tripel from BYO clone issue. I followed everything like i should, and got an OG of 1.076. I left it to ferment with WLP500 at the high end of its temp range, just like it says to do. 3 weeks later and i am now sitting at 1.020. There is no more activity that i can see (sat staring at it for 10min, no movement at all) and i was hoping to get it to go a little further. Any advice?

Wait a couple more days, and take another reading.

took that 1.02 two days ago, will take one tomorrow and report back

Some of the belgian yeasts take their time crunching away at those last sugars. But they keep crunching. I don't think I'd worry yet. Wait a few more days and take a reading. 4 weeks in primary is not too long for a Tripel.

What temp are you fermenting at? Perhaps raise the temp up 5 or 10F and rouse the yeast. Then wait a week and see what happens to your SG.

What was the recipe? Did you hit your mash temperatures? 1.020 is high for a tripel but you might be done depending on the recipe and how you brewed it.

Are you reading the FG with a refractometer? How does it taste?

This is from "Brew Like a Monk"

" Let the fermentation finish,perhaps at a higher temperature. It may take as long to get the last few points of attenuation as it did for the first 80%"

I brew a lot of Belgians and always give them plenty of time to finish.