CVT fluid

Managed to get hold of 5 litres of triple qx cvt fluid from ecp at just under 50 quid, changed 2 litres but its now a golden colour, how long should i wait for it to mix in and for me to drain and fill. Is there any other brands that are any good or any additives that can be added to help maintain or combat slippage. This is my first ever micra cvt, i dont know if it is driving as it should, feels like a bit of resistance when foots off accelerator, is this what micra cvt's do.