recharging used GFO
Yes, the sodium hydroxide is Free
- add 40 grams of sodium hydroxide to 1 Liter of freshwater to prepare a 1M solution, then soak ur used GFO for a couple of days, and rinse - ull never need to buy GFO again.
- if u want, for $25, i can prep a 1M solution, in a Lab grade 2.5 Liter bottle
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