I have a heavily planted 18 gallon tank. I am using diy co2. My tank is full of tiny bubbles coming off the plants. I have a spraybar and mini powerhead for movement. I also have a co2 indicator that stays in the green (has never gone to yellow). I change it about every 14 days when the indicator starts showing blue. There are so many bubbles that they accumulate at the top of the tank. Does anyone else have this happen. My plants, fish and shrimp are all doing great.