thanks for the update,i thought the ph would be ok but im fairly new to the whole fishkeeping thing,especially guppies. so my ph is ok at 7.5. im still thinking the ones that died were weak,the others are still doing really well,still the odd flash now and again through the sand but apart from that alls well. fry growing well,and the biggest of them went to the surface to eat for the first time today,i know i was going to feed them off but im just so attatched to them now lol! at what age/size is it possible to sex them properly? any females are going to my friend and im keeping any males,so im hoping its a kind of 50/50 of each. there are around 20 fry in there now,so that would hopefully give me 15 or so in total. i love coming down to check the tank first thing in the morning, it seems the fry change so much over the space of 1 night!