[Max Gallade] I can only think of three possibilities ,starvation,predation or ph swing. I noticed that my Ram fry don't pick that much on Java moss or Algae for Microorganisms. [John McCrone] I was going to mention that the fry seemed to be looking for food in the water column rather than picking like my apisto fry have done in the past. I assume that with starvation I would have seen a more gradual die-off as at least some should have found drifting food. Thanks for the offer of microworms - but I live in UK and they might not travel. I did set up an infusoria culture, but it hadn't got going. My plan was to mash up some daphnia and mosquito larva and see if they would eat that - but then they all disappeared. [Max Gallade] Do you use CO2 injection during the day and night in your tank? Any other fish in the tank? [John McCrone] No CO2. No other fish. If it is pH swing, then why are they fine for a few days then wham? Another odd thing was that I couldn't spot any dead bodies - even in the breeding trap I could only find one. Perhaps snails made fast work of them. It's all very strange. Cheers ------------------------------------------------------------ from John McCrone ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com.