I am new to Co2 and I got a complete CO2 system from Green Leaf yesterday:
Choice CO2 System | Green Leaf Aquariums
so, I set it up with the following diffuser inside my 75g tank:
CO2 Diffuser 5000 | Green Leaf Aquariums
To improve the diffusion of CO2 bubbles inside the tank, I have placed a small water pump with the outflow right over the diffuser in order to "blow" the bubbles everywhere in the tank, and actually works great (I can see micro bubbles everywhere).
Now, I placed the Drop Checker I got from the same Green Leaf inside my aquarium as read on the instructions:
CAL AQUA LABS Double Drop Checker | Green Leaf Aquariums
and well after 24 hours it is still blue! I started with 1 bubble per second and, seeing no results, I increased CO2 injection to 2 bubbles per second this morning at around 9:00am. Now is almost 3:00pm and it is still blue! The water is really plenty of bubbles (it looks like treated with alka seltzer!) but the checker doesn't change color: keeps showing a blue color.
My question is: how long the checker takes to react to the different concentration of CO2 in the water? Do you think I should try to increase bubbles per second?
Any thoughts are very welcome! I repeat, I am novice on CO2...