Feral-
No need to spend money on a generator kit. All they are selling is hype.
1 small aquarium air pump
1 Short length of air tube
2 Jumper wires, alligator clip style
1 9v battery 'harness' connector
1 9v battery
2 99.99% silver wires - Most expensive part, but it will make a lot of CS
1 glass jar, like a small jelly jar
A bit of scrap cardboard, thick like a box. Enough to cover the jar twice
A bit of plastic wrap, or any plastic bag
Distilled water
Take the cardboard and cut it to make two squares roughly the same size, each large enough to cover the jar. Stack them so you have 1 lid double thick. This will sit on the jar and hold the electrodes (silver wire) in place, as well as the air line. The bit of plastic will sit between the cardboard and jar, protecting it from water for the most part.
Take a small pointy object and pierce the center of your lid. Large enough to push the air line through, tight enough to hold it.
Bend one tip of each silver wire in a U, about 1.5cm worth.
Push the straight end of the silver wires through the lid, on either side of the air line. Make sure they are 1-2cm apart and never touch.
Push the short end of the U into the cardboard lid. It will help keep the wires in place.
Attach one alligator jumper (NOT Mick Dundee...) to each of the exposed U ends.
Fill the jar 3/4 with water.
Put your lid on and make sure everything is in position.
Plug in the air pump and make sure you're not splashing all over the place. You can pinch the line to limit air flow if needed, or get a little valve.
If it's all good, then connect the jumpers to the battery connector and plug in a battery.
The only thing you want in the jar is the jar it's self, the water, silver and plastic air line. No air stone. Don't use any salts. Just pure distilled water.
Run it all night.
The air bubbling is to keep the water moving and particles from conglomerating and adhering to each other and electrodes. You don't have to have the air bubbling to make CS, but you'll be cleaning the wires frequently, and I firmly believe it makes a better CS for our use.
If you have the need to measure PPM, a regular TDS/EC meter WILL NOT tell you your Ionic CS content, ionic being the key form we are looking for. You must use a PWT meter if you must know the PPMs. Or you can shoot a laser through the jar. You should see a nice strong crisp beam in the water.
If you just use CS for reversing plants, the above set up will make more than you'll ever need as a hobbyist. Just replace batteries. You can double up on 9v's and do 18v. Or you can use a plug in cordless drill battery. Or you can change the battery out for a wall charger. 12v and 500Ma or less does nicely. Then it's just plug it in.