Since you guys did a bang up job recommending a PH Meter for me, I’d like to ask what kind of stir plates you recommend as well? I’m currently using half gallon jugs instead of flasks (I’ve broken 3 flasks already for various reasons) and I was hoping to find a stir plate that could accomidate my starter jugs. I’d rather spend a few bucks more to buy a quality stir plate if it’s worth it.
Any thoughts?
Happy New Year to all and thanks again for all of the fantastic advice!
I agree +1 on building one. It is much cheaper and easy too. Many sites out there to teach you how to build one. I built a dual stir plate using a wooden box, two computer fans, two magnets, wire and rheostat. Full blown MacGyver build. posting.php?mode=reply&f=5&t=106995#
Follow up. Stir plate works fantastic and I’m very happy that I went this route. However, as many have said previously, you’ll need a flask as the convex bottom of a half gallon jug won’t allow the stir bar to move. It was worth a try.
Like a lot of my equipment that I have made, my homemade stirplate looks reallllly ugly. But it works. I took the fan from an old computer, I think it was a HP. It was mounted in a separate case, that also housed the power supply for the computer. I took everything out but the fan, and kept the case as a stand. I used 3/4 pieces of tubing to act as spacers to drop the fan down low enough that the magnet I placed on top would clear the bottom of the flask. I went to Radio Shack and bought a cheap variable speed control switch (rheostat ?) and found an old power converter from a CD player or something 9-12 volts. I wired it up and it works just fine. The stir bars I bought through eBay.
I bought 3 different size stirbars on e-bay a few years ago. The only one I could get to work was the 1" octagon banded, in the 1 gal glass jug I use for starters. The other two sizes were smaller and would just spin off. I like the 1 gal jug, have made starters from 1qt up to 3 qt step starters and ran it on the stirplate for up to 3 days with no problems.I might mention it’s a homemade plate made with a project box and rheostat from Radio Shack. To those having trouble you might try a larger stirbar.
I dont think most folks use airlocks on starters from what I understand. By putting an airlock on it you are cutting off the oxygen supply for the yeast.