Bubble counter... how often do you change fluid?
I have a bubble counter I'm using - added the fluid, got it mounted, watched it change from blue to green yesterday... all very exciting.
This morning, came in and its blueish... as I'd suspect, having the CO2 off all night. Just fired up the CO2 an hour ago, in another hour I'll turn on the lights and I suspect by then I'll be seeing green again.
So how long will this 4 dKH and Reagent last in my bubble counter? Do I need to change it daily, or weekly, or??
Or once I'm in the groove and have a feel for the bubble counter and the interval I need to keep it in the green, will I even need it at all, except for the occasional sanity check?