rock phosphate vs. triple super phosphate

hey who can help me? im tryin to make S.S and instead of rock phosphate all i could find was this stuff called triple super phosphate. anyone heard of it? well it says its derived from rock phosphate but that its a stronger dose...im assuming i should just use 1/3 of the amount. any input anyone?

"rock phoshate has NOTHING to do with this mix I used it once cause I had some I see no diff with or without
how longs your soil be sitting?"

Sub

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From page 42 of Sub's Supersoil thread. He was asked about rock phosphate and that was his response.