Thanks for the info. I will transfer them to the new tank once it's cycled. do you know at all if they have a Season. Do they breed at the onset of spring {I'll adjust daylength} or are they a bit like people, whenever the chance arises. In which case I'll wait and see. It's cool because I'd heard about them online but never seen them available in Australia. Hence why I jumped a the chance when i saw them. Unfortumately I grabbed the danios at the same time and thats where the problems arose. Maybe also although they are small, I did add 5 clouds and 4 danios at once it coold have spiked the nitrates. I havent got a kit for testing for it, thats my next buy. Always tested hardness and ph,chlorine etc but was never given the goods on nitrate testing. It explains so many of my losses when I started out in my teens. Initially i was cleaning my tank entirely every few months rinsing the gravel totally, even hitting it with hot water in a hope to eradicate any ick in the gravel. I had no idea atthe time that i was killing all the bacteria and essentially re cycling my tank constantly. no wonder the only survivors were swords. Hardy little buggers. Long time ago and many lessons learnt.