1) Use 2/5 of the amount of 50% to equal the 20% stuff.

2) 3.8 liters per gallon is good enough.

3) One teaspoon is about 5 ml

Therefore, if 1 teaspoon of 20% per gallon is your target, then you use 2 ml
/ 3.8 l = about 1/2 ml/liter of the 50% stuff.

--

Ray Barkalow - First Rays Orchids - www.firstrays.com
Plants, Supplies, Artwork, Books and Lots of Free Info!


"Reka" wrote in message
.. .
In article .com,
says...
~yes
~but not for the chemical difference
~
~
What do you mean about the chemical difference?
I need to know how much 50% Physan to substitute for 20% Physan, and
convert from Gallons to liters...
--
--
Reka

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