you posted you have fed your fish as a statement rather than asking advice,
and as you have said in your other thread, you have made your mind up not a lot anyone can say
i just hope in a few weeks your not asking advice on hith etc, tropical fish and cold water fish never live together and the chances of them ever meeting in the wild is the same chance i have of meeting a native siox living in a wigwam in my part of the UK
just MY opinion, some do use feeders personally i wouldnt, i spend many hundreds of £££s in giving all my fish the best chance possible of the longest life and live in the best conditions possible, so chucking something in the tanks that could kill them or create sickness i am not prepared to do,
I DO hope for your sake i am proved wrong as you obviously like your fish, but as i said why take any risks in what you put in the tank?
and just like Jenni x2