When you start giving away the furniture so that you have room for one more
tank.
When you start to see the mold growing on the windows.
But the most important rule in the hobby umm, let me think resist the impulse
for one more tank. (THEN WATCH OUT FOR HUMAN COMBUSTION)
Hey number 2: admit to ourselves yes, we have an addiction and will seek treatment
as soon as I set up this last tank.
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