That is what I have been told by most people, and everyone has said about it not likeing frtile substrates, etc. But this technique seems perfect for it, if you read the thread linked above, you will see that it actually is just put in a pot of pond water, and left on a window sill, so very easy! Then I will take little bit's and introuduce them into the tank, until I can get it right! Finger's crossed it will work!