My fish has floating problems and I'm thinking of feeding him gel food. Has anybody tried "Tetra Natures Delica", it claims to be a gel food that is very nutritious for the fish? Can I feed it to my floating fish as a main diet?
Any help is appreciated, thanks!

I feed those and my fish absolutely yum them up!

Although I must admit I wouldn't feed them as a staple diet; they're not the most nutritious food around. I alternate them with pellets, frozen live food, spirulina and vegetables. If you vary them with other foods regularly though they should be fine.