hi.
i have used fox farm in the past for soil growing.

i followed their feeding schedule to the letter.
i flushed with clearex every other week once into bloom.
i used either clearex or final flush for final flush b4 harvest.

always add your solubles first, then the liquids, to your water FIRST, mix well, then apply solution to soil.

i don't think sledgehammer is available in the US, yet.