If I wasn’t aware of filter swapping I would pay $5.97 for the $2.97 filter and never think about it. Because who would swap filters? No one would do that, would they? Some regular ST boxes were already filled with MP filters, no need to even swap.Seems that Walmart now carries an "MP7317". Assuming this is the "long life" version of "ST7317"?
It was confusing as my regular ST I bought before was blue. I assume all MP say MP? All regular ST are now white?