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At the time your pineapple plant is in the flowering stage so it being red like that is Normal for alot of pineapple plants some pineapple flowers are different colors like pink to red like yours and than some flowers have no color to them at all.... the way it looks right now has nothing to do with nutrient deficiency.... but you are fertilizing way to much every 10 days could damage or even kill the plant you should only be fertilizing it about once a month at about 1/4 tsp per gallon and from the photo you posted it kinda looks like it could be a Red Spanish pineapple plant but not 100 % sure
The picture of Stevo's red pineapple is considered ornamental herw. Not say its 100% inedible (or cant be eaten) but once tasted you will see why we consider it an ornamental. The OP's picture looks normal at the stage it is at for an edible fruit (variety unknown)..
Now it has some kind of purple/mangeta teeth around