I built "The bubbler" as described in "The cannabis grow bible by Greg Green" pg 144-145 complete with airstones and air pump. Then I added an additional air pump to run the foam pump. I did run the airstone on 1 outlet of my 2 outlet air pump and the foam pump on the other but I'm still setting up and experimenting. I thought 77f was the correct temp but I'll certainly look it up now to be sure. I can set the temp wherever I want.
With the variety of submersible pumps that seem to be in use for bubbleponics it seems to me that the water flow will tolerate a pretty wide range of flow rate. Is this correct? Or do you know if there is a correct / ideal amount of water flow for different growth periods. Bubbleponics just uses 1 flow rate to the top at all times right? But I've read a number of posts and some excellent tutorials and they say things like "use a pump at least 120 gph" or "Use a pump less than 200 gph or turbulence my create problems"... With all these different gph pumps their must be absolute water flow rates of a wide range. Any idea what is best or WHAT'S THE GPH ( DROPS PER MINUTE. WHATEVER ) PER NOZZLE ON YOUR BUBBLEPONIC? I'm starting a crop of radishes in the morning to get a better feel for the set-up and I guess I can just figure out what works but a little knowledge can avoid a lot of fiddling. Of course I'm asking what works best for MJ, I just use radishes to get a feel for new stuff.
BTW radishes are a very good practice crop as they grow FAST, FAST, FAST. A few days and you'll know if they are growing well. I have some in ebb and flow now.