Thanks guys, ill have a close look at the MSDS when i find it to see if there is anything else contained in it that might be cause for alarm, but i doubt there will be.
Ha ha, that contact time is for a huge qty of water at a very small ppm. For a FV the ppm would be much higher so the contact time would be the same as normal no rinse sanitisers.... At least i think so.
I use the Tanksafe product in my rainwater tank and compared it to my no rinse steriliser (morgans). Same ingredients, hydrogen peroxide and silver nitrate. Possibly different concentrations... Anyone tried it before?