I finally got my 5 lb aluminum cylinder, a regulator, some 3/8 internal diameter tubing, a 1/4 to 1/8 needle valve and some hose clamps. I set everything up, set the regulator to 9 psi and now need help with the bubble flow rate. I set it to about 1 bubble every 2 seconds for my 29 gallon tank. How would I go about fine tuning this thing without causing a massive algae problem due to unstable CO2. I just got fed up with BBA algae constantly growing on my Amazon Swordplant so I gave in to a pressurized system from my old DIY system.