Yes you see a temperature controlled aquarium and cooler with regular water in them. The water will not change temps as quickly as the air can so it provides some insulation, if you will. Tropical fish like water in the 70s, which happens to be the perfect range for kombucha. The aquarium heaters are pre-set for 78°F but the water generally stays ~74-76°.
I don't advise using champagne yeast for KT. If you want to try it, use about 1 gram per 3 liter of tea. Using dry packet yeasts you can just sprinkle it right on top and shake or stir for about a minute. Then let sit for about 5 days at around 75°F. This is your primary fermentation. While you could suppliment secondary with some yeast, I'd highly advise learning more about yeasts before trying. You'll risk producing bottle bombs, especially with champagne yeasts because they'll pretty aggressive. If you have a local homebrew shop, stop in and check out the yeasts they have. Some shops carry slants too, but you'll have to make a starter for them if you're making big batches, and they cost more.
In a separate fermentor make some new tea and innoculate with stater liquid from a previous batch, as you normally would. In this experimental container add 1g of dry ale yeast per 3 L of tea (total volume). Shake or stir for 60 seconds to mix and aerate well. Then put your SCOBY in, if you so desire, but it is not necessary. Cover and store as you normally would. Check it in 7 days. Ale yeast attenuation is so you'll be left with at least a little sweetness. If you really want almost no sweetness at all, bordering on astringent, only then use the champagne yeast. This way if you don't like it, you haven't mixed it with your main strain.
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