I have a 30 gal heavily planted w/ 96w CF over the tank, 60lbs of Eco-Complete Sub Strate and Black Rocks over them. I'm running 3 DIY JELLO-CO2....as mentioned in the Sticky Above (best DIY I've found yet). My kH stays about 4-4.5 and my pH stays about 7.4-7.2 (at the LOWEST). There is little to No surface aggitation. According to everything I've read I need a higher kH or a lower pH for the correct concentration. Other than Pressurized CO2 (dont have the money....I'm in college) how many DIY could i put on there safely?