in a small aquarium, you could possibly see the benefits, but in a 75g, you
would have to add a teaspoon every 5minutes, for a whole day, to see any
evidence of the CO2 being added, because when you have a CO2 setup, you're
only putting in 2-3 bubbles per second, which equates to the smallest
amounts, your seltzer water couldn't shake a stick at...

"Dick" wrote in message
...
I want to experiment with CO2. I read once that Seltzer water could be
used to add CO2 to the water. If this is feasible I wonder what would
be approximate formula for a 75 gallon tank. I found quarts at my
local market with no salt.