If you are using DIY CO2 with a Hagen ladder, you don't need to take any special precautions, such as night time bubblers. I have that setup in most of my tanks and even my two one-gallon tanks and there is no problem. I have discovered however, that if I forget to turn the light on in a 1 gallon tank with the DIY CO2, it will crash the PH. Assuming you are using a timer, which I do on all my tanks but one, you can prettymuch just let the CO2 levels take care of themselves.
By the way, as a funny little anecdote, I tried to turn off my DIY CO2 when I first set it up. I put a valve on the air line and closed it at night. The next morning when I turned the valve back on, so much CO2 came out that it was just one great big bubble of wasted gas. Then, the yeast culture died, probably due either to poisoning itself with CO2 or the massive pressure change caused by the sudden release of the valve. Needless to say, it didn't work as well as I had hoped.
Two 1 GA desktops, a 5 gallon, a 2.5 gallon, a 10 gallon, a 20 gallon, a 25 gallon, and two 75 gallon tanks, all planted.
I am an expert on algae, so ask me if you have questions. I know how to grow it, just not how to get rid of it.