I have a pretty mature 55 gallon tank and I have 10 giant danios and 6 pearl Danios. I also got a rainbow cichlid, a Firemouth cichlid and an EBA. My question is how long should I give my cichlids to adjust so I can feed them? I tried today and they just stayed at the bottom and hid from me which I expected would happen at first. Do those fish feed best from the bottom at first? Do I need to get bigger sinking pellets?