I have tried every floating plant that was suggested (frogbit, duckweed, water lettuce, and salvinia) to prevent gouramies from destroying floating plants roots, however nothing did not work, worst, they dont even try to eat what they destroy. Some fish keeper said that they are just building bubble nest, however this is not i my case, they just tear the plant roots and leave it floating and do nothing with it and keep doing the same thing until there is no roots left of the plant and when new roots appears they will destroy it again. I have fed them algae and spirulina pellets but it seems they still keep destroying the roots. Ah man, I thought they like floating plants because they love to hide but it seems they like to destroy them and I dont know why. I think It is best for me to stop keeping floaters for gourami. I guess I will try to transfer some of my other female gouramies to my pond to lessen the damage. But I still need some clarification why does female gouramies destroy roots even though they are not yet ready to lay their eggs or dont carry any eggs with them in the first place.. Are they doing this for fun? Or theres these small parts of the root that they like to eat?