i have a question how often should i feed my red-tail cat fish and who much? right now i feed her tilapia half inc wide by 7 inches long and i feed her 2 to 3 pieces like that 2 to 3 times a week. is this fine and is it good to hand feed her? and i feed her massivore pellets too.at times.what ever she dont eat i take out.this is my first massive cat fish her name is jill