I have things that I check weekly and that is one of those things. Takes about 5 seconds...open the bay door, look at the tank, level is still between the two lines, close bay door, done. I may add some coolant maybe once or twice a year. I use the newer boiler fluid and I carry 2 of the gallon containers, one open and one still "new" (sealed container). The reserve tank is very close to the top of the bay making pouring anything a messy proposition. I found a utility pump (like a liquid hand soap pump with a hose). Works great, stick the hose in the tank, a couple of pumps and that is it. Pump has a hanger for the hose, so, it just stays on the jug. No fuss, no muss.