What are recommended best practices for maintaining a closed loop at peak performance? Rust inhibitor? Checking PH? How often? Should a complete change of fluid be done? If so, approximately how often? Any other additives that are recommended? I just started system up in December of '18 so it is not an issue yet, but want to be prepared. I am using ethanol antifreeze, but also for others benefit, post any difference with other types as well. Your advice would be appreciated!
The point of closed loops is almost zero maintenance. Make sure you have fluid. I test methanol concentration yearly. I added rust inhibitor since non pressurized will introduce oxygen and you will have rust.
