I'm going away on holiday and am leaving my house mate in charge of my tank. I want to make it as idiot-proof as possible. Currently I'm dosing ~5ml of DIY TPN+ and 2.5ml EasyCarbo a day. I have an old TPN+ bottle that doses 10ml in a go. Would it be possible to make an all in one mix of say 3:1 DIY TPN+ and EasyCarbo and getting him to dose 10ml a day (giving 7.5ml ferts and 2.5ml EasyCarbo) or would this concoction be unstable/risky? They mix in the tank with no issues so they should be ok in a bottle... except the concentrations are going to be much greater.