As you say, I should only be interested in knowing if my coils are covered. The sight glass should read the volume of the tank, regardless of what’s in tubing and coils. Sure I can figure it out based on the level in the sight glass but why did you mark it with numbers if they don’t matter?
So...
Hope your experience is going better than mine. So far I’m not impressed with what I received.
Hopefully Spike updates the OP here as they are now listing as a 7 gallon tank, not 9. As I filled mine with the recommended 7.5 gallon mixture it overflowed at 7. Sight glass reading is inaccurate as...