Lets make a distinction between pearling and streaming.ShaneSmith said:wendtii has traditionally been one of my heaviest pearlers
Crypts are big streamers from damaged spots on leaves or roots. They will stream a bubble size proportionate to the hole of origin. Streaming is not dependant on O2 saturation and will begin a few minutes after lights on. Often streaming will catch under the leaves of taller plants and look like pearling from those plants.
Riccia is a notorious pearler. It will begin forming small bubbles several hours after lights on. These bubbles begin small and grow till large enough to break away, they do not form streams of bubbles. Pearling is dependant on localized O2 saturation.
Shane are your crypts streaming or pearling?