Originally Posted by LesPaulLover
-I generally always monitor my temps when gaming
-Clear tubes but it's a completely closed "silent design" case (no windows on the side panels)
-Just distilled water + "Coolant concentrate: EK-CryoFuel Clear Concentrate (100mL; for 1L of coolant)"
OK I should clarify: it's the "Coolant concentrate: EK-CryoFuel Clear Concentrate (100mL; for 1L of coolant)"
so it doesn't have anything in it. It just looks like slightly-more-opaque water - doesn't seem to have any particulate or anything in it. In fact it had to be mixed with 1000ml of water (which was too much for my loop) and the rest of the mix has been sitting in my storage closet for 2 months now. There's no sediment or anything settled in the bottle.
Unfortunately there is no "magic" calculation on how long between changes, it'll be a bit of trial and error. Its good you're monitoring temps, that will help you detect a problem. Keeping water temps low will increase your anti-corrosive additive life but ultimately it will stop working and will need new fluid. I think 1 year should be max if you want to be safe. 6 months if you want to be REALLY safe. I think the longest I went was about 1.5 years and the CPU block was pretty gross but not terrible.
Asus Prime Z370, Intel 8700k @5.0Ghz, Nvidia GTX 1080 Ti, 16GB @3400 CL14, Watercooling: x2 MCP355 pumps, x1 280 on front of case, x1 360 on top of case, x1 140 on back of case, x1 240 on bottom of case