I, too, at one point, used a DIY then switched. Too much of a hassle. For my 10g I used a water bottle ratio of 1 cup sugar and a table spoon of activated yeast and got a nice flow at 1bps. I used a broken end of a chopstick. Not enough pressure for a diffuser. It took about 30 minutes to pressurize. I didnt use a bubble counter. Just stick the tubing in water without a diffuser first to count the bubbles. Only need to use Luke warm water, too.