This may be a silly question, but I'm curious - I bought a bottle of Tetra AquaSafe recently, because I'd run out of plain dechlorinator, and it was all the teeny LFS around the corner had. It mentions on the label that it 'detoxifies heavy metals', and I read somewhere that this isn't good in planted tanks because plants need certain metals. Does anyone know if plants are able to absorb these nutrients after they've been 'detoxified' by the conditioner?