Schultz's Brewery Wash (CAMF Wash)

The ingredients are:
2 parts Sodium Metasilicate (28.5%)
2 parts Sodium Percarbonate (28.5%)
3 parts Sodium Carbonate (43%)

Combine the above ingredients, mix well. Keep dry, well sealed, away from heat.

To use, mix it with hot tap water. What I do is add 1-gallon water to a bucket or carboy, add the CAMF wash, and then add the rest of the water, which is usually enough agitation to assure it dissolves completely. I use 1 Tbsp per gallon, but that is much more than needed. 2 Tbsp is enough for cleaning a 6.8-gallon carboy. When using this stuff on carboys used as a primary fermenter, more than once I found myself laughing at how it strips the hop residue off. You can easily hear the bubbling sound.

The only reason I use it at the 1 Tbsp per gallon rate is I want to be sure the levels of Percarbonate are high enough to produce enough oxygen to sanitize. I always rinse, and haven't noticed any off flavors associated with poor rinsing.

At 1 Tbsp per gallon the pH is 11.5.

I have considered changing this formula by adding a small amount of Sodium Sulfate - maybe lowering the Sodium Carbonate to 35% and using 8% Sodium Sulfate.

Another blend I use is 80% Sodium Percarbonate and 20% Sodium Sulfate. It doesn't clean as well, but I'm confident the Sodium Percarbonate is strong enough to sanitize, and the Sodium Sulfate is a wetting agent, which helps get the stuff into nooks and crannies. One Step is approximately a 50/50 blend - I just use less than their recommended 1 Tbsp per gallon since I know the Percarbonate is in a higher concentration.

http://www.jschultz.net/text/CAMF.html