Sorry if my post above sounds mean or harsh or negative. I'm not trying to be a jerk, I promise! I just want you to grow many many happy little ladies and fill some jars.

Yes, the bubbler is super simple and works if you keep your temps in check. The DIY bubbler has been around for a while, but Lougrew used the metal res to keep the water cooler, the opposite problem I had, hence the plastic.