Planted Tank Obsessed
Join Date: Dec 2012
Location: In an aquarium nearby
You try to pick it up too often.
I have Riccia in my Glossostigma carpet and the darn thing keeps popping out every time. I never managed to get it out unless I let it grow. If you try and prune it often there's bound to remain some small pieces in and they will grow back. If you let it grow more it should be easier to get it out completely.
One important thing, try to change your water movement as to not blow downward currents in the hair grass. Riccia should pop out as it's filled with gas. Try to get it pearling and you should spot even the bits of it.