I should clear up my answer, because I think Tony is correct. I feed live and frozen to all of my CA/SA fish and have had no problems. However I have just recently stopped feeding frozen bloodworms to my Africans. I have notice over a period of time that a few different sp. of African cichlids would die over night after feeding them frozen bloodworms. Now these are fish that have been healthy for months, and every time I would see a dead fish I would think to myself "what is going on these fish were just doing fine". Well I started to connect the dots and I realized that every time there was a death the day/night before I gave them some frozen BW. Now this all could be coincidental but I fell that it was the frozen food. I could be wrong it could very well be anything that could have caused the deaths but I must say I have had no further deaths sense I have stopped. :confused0083:
By the way it was a Hikari frozen food product and they are a great company, and again I still use this product with my CA/SA almost daily but no longer with Africans.