If they are the ones on the link i sent, that is NOT a maxi mini.
The mini carpets don't get bigger than a silver dollar, dwell in the sand, and generally have the same care requirements as a haddoni. I know that these mini carpets split on their own, have never tried to split mine manually. (i've never tried to split a maxi mini either)
Maxi minis are tougher than a $2 steak and can be manually split.
I have had both types in the same tank. My first mini carpet i, like you and so many, tried to care for like a maxi mini (placing in the rocks, somewhat dirtier water) and it lost its color, never attached, and died...while the maxi minis thrived.
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