I am very interested in this thread. Please post more info about how you got the Gluteraldehyde and its long term effects.
I concur and have done this personally. It will even kill shrimp and snails if dosed too high for too long.Google cache. I can't find the original thread. Or rather, haven't looked for it.
PlantedFanatics.com :: View topic - Effects of Seachem Flourish Excel on BBA
The effects of Seachem Flourish Excel on BBA were documented with images and texts. It shows that Seachem Flourish Excel caused the BBA to turned red within 24 hours. The BBA gradually turned white over 120 Hours and disintegrate slowly thereafter.The experiment shows that Seachem Flourish Excel has successfully eliminated BBA. We would advise that Seachem Flourish Excel should not be use as a permanent way of removing BBA, as solving the root of the problem is the key to prevent future outbreak. We realised that Flourish Excel should not be used in large amount on mosses, riccia, and fissidens. It may cause them to turn brown or even kill them.
So MatPat, high doses of Excel *will* kill riccia. =)