My tank is 60 gallons. I have installed a CO2 system with a Sera 500 reactor connected to the outlet of a Fluval 407. I have it set to about 4 bubbles per second which seems about right. My issue is that the system is blowing tiny bubbles all over. It makes the water look like it has little specks floating around. What can I change to help reduce this? Larger reactor? Lower operating pressure (it's 15psi right now)?