When I change my mixture in my 2 Nutrafin systems I get bubbles initially
for only a couple of hours, then about 12 - 24 hrs later the system starts
bubbling again and lasts a couple of weeks.
The Nutrafin instruction state that this might happen.

How long are you leaving the mixture before you decide it isn't working?

Tony

I let it run for about 4 days and no luck... Since I made my initial
post I filled a 1 gallon Hawaiin Punch container with a mixture that
was meant for a 2 liter bottle and have been getting excellent
bubbleage (for lack of a better word It has been running strong
for 4 days now so I'll keep my fingers crossed and see what happens.
The bubble counter works great.... bubbles dwindle to practically
nothing by the time they reach the top and I usually have about 8 or
so in there at any given time.