i just bought a container of NLS jumbo fish formula 4.5 mm floating pellets to feed to my jag,dempsey,con,gr terror. i only bought the "jumbo" pellets cuz they float and they only had regular cichlid pellets in 1 mm sinking. is this stuff good?, i read that they guarantee results in a week or something like that. i payed 20 bucks for 7.9 ounces .