[i]
You can add those Gammarus you pull out to a cichlid tank. They are efficient at eating them, though few other fish are. Gammarus are a bit too hard shelled and slippery for most fish. Even if the Gammarus ate the crypt leaves, if the roots are still in place, the crypt may slowly recover. Of course if they had time the Gammarus will have dug out and eaten those roots too.