Seems to be a debate on types of Catalysts that should be used in HHO production.
Everything I find about using catalysts states to start with a small amount, increasing gradually until your goal amperage is reached, bear in mind that a cold start may be at 10 amps and gradually increase as high as 15 to 30 amps depending on which catalyst is used. Some catalysts such as baking soda are consumed during HHO production, while others such as NaOH are not consumed, and only water needs to be added.
If you have definitive research about a particular catalyst please let us know the details, so we can add the intel for all to use.
Here are a few that are commonly used and inherent pros/cons with each.
Baking Soda: Sodium bicarbonate or sodium hydrogen carbonate is the chemical compound with the formula NaHCO3. Above 60 °C (140F), it gradually decomposes into sodium carbonate, water and carbon dioxide. The conversion is fast at 200 °C (392F)
Vinegar: is a liquid processed from the fermentation of ethanol in a process that yields its key ingredient, acetic acid. The acetic acid concentration typically ranges from 4 to 8 percent by volume for table vinegar  (typically 5%) and higher concentrations for pickling (up to 18%). Natural vinegars also contain small amounts of tartaric acid, citric acid, and other acids. Commercial vinegar available to consumers for household use does not exceed 5% and solutions above 10% need careful handling since they are corrosive and damaging to skin. Stronger solutions (i.e., greater than 5%) that are labeled for use as herbicides are available from some retailers.
KOH: potassium hydroxide, sometimes known as caustic potash, It is very alkaline and is a “strong base”. The dissolution in water is strongly exothermic, producing substantial amounts of energy in form of heat, leading to temperature rise, sometimes up to boiling point and over; concentrated aqueous solutions are called potassium lyes. As a very strong base/alkali, potassium hydroxide is strongly corrosive, both towards inorganic as well as organic materials, including living tissues; care must be therefore taken, when handling the substance and its solutions. Its corrosivity is sometimes used in cleaning and disinfection of resistant surfaces and materials.
NaOH: Sodium hydroxide, also known as lye, caustic soda, is a caustic metallic base. Sodium hydroxide forms a strong alkaline solution when dissolved in a solvent such as water. It is used in many industries, mostly as a strong chemical base in the manufacture of pulp and paper, textiles, drinking water, soaps and detergents and as a drain cleaner. It is deliquescent and readily absorbs carbon dioxide from the air, so it should be stored in an airtight container. It is very soluble in water with liberation of heat.
- 10%, dilute sulfuric acid for laboratory use,
- 33.5%, battery acid (used in lead-acid batteries),
- 62.18%, chamber or fertilizer acid,
- 77.67%, tower or Glover acid,
- 98%, concentrated acid.
The hydration reaction of sulfuric acid is highly exothermic. If water is added to the concentrated sulfuric acid, it can react, boil and spit dangerously. One should always add the acid to the water rather than the water to the acid. Sulfuric acid reacts with most metals via a single displacement reaction to produce hydrogen gas and the metal sulfate. Dilute H2SO4 attacks iron, aluminium, zinc, manganese, magnesium and nickel, but reactions with tin and copper require the acid to be hot and concentrated. Lead and tungsten, however, are resistant to sulfuric acid.
Salt: composed primarily of sodium chloride, with the formula NaCl. elemental chlorine is usually produced by the electrolysis of sodium chloride dissolved in water. Along with chlorine, this chloralkali process yields hydrogen gas and sodium hydroxide, according to the chemical equation
2NaCl + 2H2O → Cl2 + H2 + 2NaOH
Chlorine It has a disagreeable, suffocating odor that is detectable in concentrations as low as 3.5 ppm and is poisonous. This should be avoided as a catalyst completely just for personal safety.