Hi Nikki Sorry to hear about the death of the yellow. The white stringy stuff indicates digestive problems/bloat. Feeding the blood worms would be what has caused it - african cichlids can't eat blood worms, meaty foods and some cheaper pellets. In the wild, the yellows would mainly graze on a diet high in algae and relatively low in protein. They can't handle the high protein content. Best way around it is to feed them new life spectrum cichlid food. Your parameters looks OK but the temp is at the higher range, maybe aim for around 25-26. For africans, the PH could be slightly higher around 8. I understand you may have kept it a bit lower to not stress out the bristlenose and Jack demsey. When these are gone, you could add some more buffer, holey rock, coral/coral sand to keep it high. Good luck with the africans. The way you post photos is to upload them to picasa/photobucket etc and then add a link to it in the post. Regards, Rob