Hello Guys! I've converted my nano to be low tech. I can't keep up with the CO2 costs. I read somewhere that you shouldnt water change for a low tech but is this right? I wont be dosing any liquid carbon but what should I be dosing? I gather any EI type dosing would just induce algae and as I already have blue/green algae I dont want to help this take over. Any advice apreciated.