Good day all! I have about a 3" green terror that was eating Nutrafin Max Cichlid Spirulina Sticks and broken up chunks of Massivore for weeks and this week he has shown no interest in the floating food and will take the massivore into its mouth only to quickly spit it out again. Water parameters are fine and just did a change yesterday. He is the only fish in a 33 gallon grow tanks with plants, driftwood, rock and temp at 81. Why is this fish spitting out food it used to love?