Yes Gibberelic acid.
Here are some pictures of a cloner I made last summer.
The first one I bought convinced me how well these things can actually work.
The original cost about $65 US, and mine (all parts included costs about $30 ), and make 6 more clones.
The cover is roughly 30cm x 50 cm. The tub is about 25cm deep.
The only problem with the commericaly bought ones is that the spacing between the plants is very tight.
I made mine from foam inserts bought on amazon, and insert holders are made from 2 1/2 in netpots (which have the bottom cut off.
).
Cutting the holes in the cover was easy with a door knob cutter. (nice and slow on a piece of backer board).
Get yourself a bigger than needed air pump and stone.
The science behind the success is lots of oxygen in the water.
Use at least one big airstone, or two if possible.
You will notice rooting will be better, there where there is more air bubbles. so spread it out.
Also, keep your tray on the ground or in the shade and a cool place.
The pump circulating the water can make the water get hot (not good).
I've tried with and without the Clonex (doesn't make a very big difference).
Good bubbles means more!
And keep the stems at least 3-4 cm in the water.
Clone moms is the way to go for sure.
I believe your Candida and my Cannatonic have a lot in common.
I had no problem getting roots from the cannatonic , ready for soil in 8 to 10 days.
If you are going to add something to your water, add phosphorus to help the roots to get going.